766 results found in Horses for Sale. Buy horses and ponies for riding or driving, showing. Shetland Ponies to Shires by way of Welsh Cobs and Thoroughbreds
Always view and try out horses prior to purchase. Never purchase or pay a deposit for a horse unseen. Dragon Driving recommend having a horse vetted before purchase with an independent vet. The advert details are supplied by the seller. Dragon Driving does not accept liability for any horse that is not as described or any related misinformation contained in advertisements. Dragon Driving is not a party to and will not be responsible for any transaction or disputes concerning sales via this website. Please see our Advice to Buyers.
Not all sellers on Dragon Driving are private. A T next to a contacts name indicates that they have declared themselves to be selling in the course of their trade.
Featured
Grey mare, companion / broodmare, 12.2hh, estimated 12–14 years. A lovely, sensible mare who would make an ideal companion or broodmare. She came out of a previous ridden career due to an old injury, but is a pleasure to have around and very easy to handle.
Excellent with her feet and farrier. Halter broken and easy to handle. Easy to catch. Respects electric fencing. Stables perfectly. Sensible and straightforward all round.
Would make a lovely companion or broodmare. A genuinely uncomplicated mare who is easy to have around and would suit someone looking for a quiet, sensible companion. Delivery available.
Price: £350 ono
Location: Cannock Staffordshire
Contact: C H Cobs - T
Shetland x gelding approx 4 year old. Has been lightly backed and turned away, ready to start his full education now. Halter broken, ties up, leads anywhere you like.
Easy to handle, good for the farrier and to load. Ideal little pony for someone. Rough height estimate 40 inches. Standard size Shetland.
Delivery available Staffordshire based.
Price: £400 ono
Location: Cannock Staffordshire
Contact: C H Cobs - T
15hh 5 year old ex racer. Unfortunately only had him a few days but he is not suitable for me due to still being quite babyish and doesn't like leaving our Shetland.
Have been told he hacks well and schools well but I have not tried. He needs a confident handler on the ground as takes his confidence from you. He's not nasty in any way but is strong and can be stubborn and plant his feet.
Vacs and feet up to date. Not suitable for children due to his age.
Price: £1,500
Location: Fareham
Contact: Stephanie
Harry mini Shetland gelding 8 year old. Harry is absolutely 100% to do and mess with on the ground, will stand all day to be groomed and fussed with.
Harry would make a perfect first child's pony or even a therapy pony. He's great to show, box, clip, catch, etc... He's golden to be ridden and has been in the cart a couple times.
Price: £950 ono
Location: West Midlands
Contact: T - T
Rose, ride and drive, she has a very big heart and will trot all day. She's not been in this entire year but come put her in and see for yourself. Very nice kind mare. Good to box, shoe, clip, all round good.
She doesn't need a big write up she's done everything, London drives to show jumping with with children with the previous owner. I've mainly driven her. She's been ridden in the river at the New Forest. She's very good with my boys she's not spiteful at all.
She's 13 year old now. I have to cut down on the horses I have way too many and not enough turn out for them all. Passport ready to go and have some fun on. Based Maidstone Kent.
Price: £4,750 ono
Location: Kent
Contact: Thomas
Lego 17 year old jack donkey. Very quiet and friendly, has lived on his own for 5 years at previous home.
Passport and microchip.
Price: £625 ono
Location: Norwich
Contact: Barry - T
Bobby, 5 year old gelding donkey. Very quiet and friendly, has been sat on.
Passport and microchip.
Price: £625 ono
Location: Norwich
Contact: Barry - T
Banksy, 16.1hh 13yo TB gelding.. Safe, straightforward and genuinely fun to ride. He would be an ideal horse for a teenager or amateur wanting something they can enjoy straight away while continuing to produce up the levels.
He really is the definition of a safe but fun horse, sensible enough to look after his rider without being boring, and with plenty of ability and potential for someone wanting to further produce him and move up the levels. Would make a cracking eventer or hunter! A really special horse who has quickly become a firm yard favourite and will be very hard to see go.
Banksy is a good doer and loves living out with his friends, although he is equally happy to come in and loves having a stable too. He is sound with no known injuries or vices and is open to any vetting and instructors. Transport and tack available at extra cost. TEXT REDUCED
Price: £6,000 ovno
Location: Surrey
Contact: Kim Jones - T
A full up 14.2hh, 5yr Connemara x Irish mare (breeding unrecorded), she has a fantastic attitude to life & a pleasure to have around. Bella has done a bit of everything & takes it all in her stride, hacks happily both alone & in company, is excellent in open spaces, will happily walk on a loose rein across fields without getting strong or silly. She has a kind, genuine nature, snaffle mouthed & is safe, sensible & fun to ride. On the flat, Bella works in a lovely, consistent outline in walk, trot & canter.
Bella lives happily with both mares & geldings, can live in or out, has no stable vices and is easy to catch, clip, shoe & bath. She is a much-loved pony with a lovely temperament who is ready to give her next family years of fun. A genuine, safe and versatile pony who would excel as a pony club all-rounder, working hunter, show pony or family best friend.
Only available to the very best home. No injuries very good doer hardy type. Hundreds of photos and videos available on request. Transport available. TEXT REDUCED
Price: £6,750 ovno
Location: Surrey
Contact: Kim Jones - T
Yearling chocolate filly, four white legs, 11.2hh now to make 13hh. Passported and microchipped.
Very quiet, been handled by children. A very pretty filly. Withheld numbers will not be answered.
Price: £750
Location: West Sussex
Contact: Rachel
Irish sports horse broodmare, proven, 16hh, 17/18 year old grey ISH broodmare, 16hh she would ride again but with a steady life, she's been in the field the last 2 years, good lines including cruising, exceptional broodmare who knows what she's doing, been turned out in a herd and been grazing with cows.
She is sold as seen as from the field, lives in or out but will be a bit stressy when she first comes in until she gets settled as been in a herd for 2 years. Things to note, she is a quiet mare, good temperament while she's been with me. Can get attached to other horses. Will ride again with a bit of time put in to her but she will need to learn to trust you, you can kick out round her, etc... If you're to hard on her she does not like that.
Scar on back inside leg due to barbed wire, wormed up to date. She can be funny loading, she prefers a wagon or box over a trailer. She will be stressy for a bit when she first leaves as attached to one of our other mares. Change in direction.
Price: £1,100 ovno
Location: Lancashire
Contact: Dan
Budore Samson, 14.1hh Welsh sec D 4 year old stallion. Samson is an old fashioned, very flashy stamp of a Welsh cob going back to some very old fashioned bloodlines including Friskney Frolic, Nebo, Cipping Red Flyer, Coming King, Llanarth, Fronarth, he's got it all.
If you are into showing/ breeding/ driving/ riding, then a cob of this calibre is definitely the one for you as he has serious potential to go all the way to the top in the right hands and will more than fulfil any roll he's given and more.
Samsons conformationly correct in every way, he's as straight as an arrow, he does not dish or have any bad habits at all. He is an absolute gentleman, he's good to shoe, worm, load, bath, catch, etc... This is an extremely hard decision and one not made lightly at all he's only being offered as he is one of 3 full brothers and can't keep them all based in Northern Ireland any more info please message.
Video Link: https://youtu.be/GKy9oA91ZY0
Price: POA
Location: Belfast
Contact: James
15hh coloured pacing mare, 6 years old. Passported and chipped. She is 100% to do in all ways and bombproof in the heaviest of traffic.
She tethers, stables and can be caught in any sized field. She doesn't pull or act silly and will stand all day long.
A sad sale due to change in circumstances. I've done everything with this mare. She can be served with my chip and pin colt before she goes if needs be. Will deal for carts, harness or take a cheap px.
Price: £3,000 £2,800 ono
Location: Northumberland
Contact: Alfie
Standing at stud, Parc Royal Express. Trevallion Roy Rogers x Parc Princess Royal. Ride and drive, licensed and proven with foals on the ground, Prince doesn't need a big write up as quality speaks for itself.
Natural covering only £250 nffr. Based Bradford. Livery fees apply.
WhatsApp messages only.
Price: £250 NFFR
Location: Bradford
Contact: Becky
This beautiful 5 year old 15.1hh Welsh D palomino mare is a real head turner. Savannah is both ride and drive giving her a great foundation and prospect for the future. She has mainly been driven and is very good in all types of traffic.
She is now enjoying hacking on the Downs and is becoming increasingly established under saddle. She has a super temperament and is a pleasure to have around.
Savannah is happy to live in or out, she is good for the farrier and loads well. She also loves being hosed off after work. She is the sort of mare who catches everyone's eye wherever she goes with her beautiful colouring and lovely Welsh D presence.
Video Link: https://youtu.be/r1OzpArpJKA
Price: £8,000 ono
Location: Brighton
Contact: Mary
5 year old grey Irish sports horse mare, about 16.2hh, she is sold from the field completely untouched so a blank canvas for anyone. She is halter broken but had nothing else done with her due to other commitments.
Just been wormed, she is a homebred, never travelled but we are willing to load and travel her. She has never had nor needed a rug on, absolute definition of a good doer and has lived out all year, would make an amazing hunter/eventer or she would make a brilliant project for someone with more time, brilliant breeding, replacement passport
It's a shame to leave her sat in a field when she can be out doing a job for someone, lives people and attention, lived out in a herd, used to sheep and cattle. Happy for a vet check before she goes. No caller ID and unknown callers won't be entertained, no messers. She is sold as seen from the field.
Price: £2,000 ovno
Location: Lancashire
Contact: Dan
5 year old 15.3hh gelding cob x Standardbred, absolute gent of a horse, easy to do in every way, catch, box, shoe, clip and load. No vices. Sad sale due to change in circumstances.
Ridden by a 13yo. Novice ride but due to age experience is required to bring his education on. Lightly schooled and been out jumping and attending clinics.
Hacks out alone or in company. Gorgeous boy, fab all rounder, loves to jump! Please message me for more info and photos, etc... Serious enquiries only.
Price: £6,000
Location: East Anglia
Contact: Lucy
15.2hh, 5 year old registered Connemara gelding. Really lovely, sensible boy who has had a good start in life. He's genuine, kind and has plenty of ability. We really do think he'll make someone a cracking horse with a bit more time and experience.
We recently bought him unseen and, although he is exactly what we were told he was, we've realised he's just a little too inexperienced for the intended young riders current ability/experience at the moment. This is no fault of his at all and it's a really difficult decision to sell him.
He's still young and learning, so we'd really like him to go to someone who can continue his education and bring out the best in him. A lovely home is really important to us and we'd like to get it right for him this time. Priced accordingly as we would like to find him the right home fairly quickly. Open to sensible offers, but please no silly ones. Viewings and vettings very welcome.
Price: £6,000 ono
Location: Essex
Contact: Lily
Stunning skewbald Dartmoor hill pony, looking for her forever home. Beautiful skewbald 2 year Dartmoor hill pony filly, currently standing around 12.2hh and expected to mature at approximately 14hh.
Halter broken. Lives out happily with other horses. Sweet, friendly nature. Well-marked. A lovely blank canvas ready for someone to bring on. She has a kind temperament and is socialised, making her an ideal youngster for someone wanting to produce their own family pony, all-rounder.
She deserves a knowledgeable home where she can continue to grow and reach her full potential. Please message for more information, videos, price or to arrange a viewing.
Price: £700 ono
Location: Carlisle
Contact: Claire
Little half bred colt 3 year old, 13hh. Not very coltish, driving done bit of riding, no fuss. Just been shod. Good to catch, good in stable or field.
Wormed, quiet, good with dogs and kids, teeth done. Ripped his mane out on fence growing back nicely. Out of fireman sam, well known trotting horse.
I'm after something bigger. Will have a chop or cash.
Price: £1,500 ovno
Location: Chichester
Contact: Charlie
14hh 7 year old black and white mare. Proper old fashioned mare.
Please call for price.
Price: POA
Location: Yorkshire
Contact: J
12 year old gelding – super safe riding pony. Confidence giver/ all rounder. Just shy of 13hh, measured on the height stick. An absolute cracking happy hack, who will go anywhere you ask. Brilliant in traffic, including traffic lights and islands, will stand all day until you ask him to walk on. Hacks alone or in company.
Just done a 4-5 mile hack and in work now. Seriously good in traffic. Easy to catch, ties up anywhere, easy to bath. Great for the farrier – feet just done. Just wormed. Easy to load onto a box or trailer, travels perfectly. Good in the herd, stables happily next to mares or geldings, respects electric fencing.
Kind natured but with plenty of character and lovely, floaty movement. Beautiful big, long mane. A really straight forward, sensible pony who is a pleasure to have around and ride, most definitely has been driven before in past, unfortunately no videos of that. 100s of videos available. Delivery available.
Price: £1,850 ono
Location: Cannock Staffordshire
Contact: C H Cobs - T
Lovely blue blagdon filly to make 13hh. Very, very quiet to catch, lead, load and pick feet up.
Has a lovely temperament, a very pretty filly with loads of class, good head and back.
Ideal as a show filly or for someone's breeding program. Will make a superb mare. Very, very cheap for what she is.
Price: £950
Location: Kent
Contact: Bill
Tyngwndwn Paige boy, Cash is for sale through no fault of his, I have to sell him due to change in circumstances! Cash is a true type Welsh section A with excellent confirmation!
He would be a great asset to any stud, he has been lightly shown and always comes away with ribbons. Cash will stand all day to be groomed and bathed. He loads and travels excellently. He can get a little bit giddy around mares due to him being a stallion!
He goes out in the field on his and he respects the fencing. He's good to be stabled etc... Good home only. Up to date with jabs, etc... Please message me for more info. Experienced handler only due to him being a stallion. Home's more important than price.
Price: £1,600 ovno
Location: Wigan
Contact: Charlie
Stunning Welsh Section D black show colt foal ready for the early shows. Bone, type quality and movement.
Beautifully bred by our young stallion Hillgarth Hombre whose movement he has inherited out of a mare by Trevallion Hooch, out of a Derwen Telynor mare.
Would like this colt to go to a showing home.
Price: POA
Location: West Sussex
Contact: Stephanie - T
Billy, mini Shetland gelding, 4 years old. Ride and drive. Been a pet for past two years, he's so quiet, never kicks or bites.
Been on local drives very sensible. Goes out in groups or on his own. Very sad sale as kids are moving up a gear.
Won't be begged as he's worth his weight in gold.
Price: £1,500
Location: Teesside
Contact: Melanie
14.3hh 6 year old cob x mare. Smart moving cob. Hacks out alone or in company. Schools nicely, pops a fence either SJ or XC.
Ready for someone to bring her on and produce. Clean legs, no vices, good to catch, load, in and out of the stable, etc...
Up to date with farrier and dentist. Passported.
Price: £4,500 ovno
Location: Doncaster
Contact: Sarah
Stapleford Hero, outstanding registered Hackney stallion. A rare opportunity to acquire Stapleford Hero, an exceptional registered Hackney stallion with top-tier bloodlines and serious show-ring capability.
Broken to harness, he shows explosive natural movement, brilliant vertical knee action, and incredible engine from behind. Pedigree: Premium Stapleford bloodlines tracing back to foundational high-stepping lines, including Flashwood Vulcan and Heartland Prophet. Show Record: 2nd place – class 9: Hackney pony stallions 4YO+ at the Annual National Breed Show. 7th place – novice Hackney pony of the year in a highly competitive national field.
Status & breeding: registered stallion, unproven (has not covered any mares yet), offering an exciting fresh opportunity for a stud or an ambitious private show home. Sane, honest, and dynamic in harness. Fully up to date with routine care. Serious enquiries only.
Video Link: https://youtu.be/0iZ3WJPWjbM
Price: POA
Location: Bridgend
Contact: Sue
Yearling Section D colt. Fronarth bred. Chestnut with flaxen mane and four whites.
He can be gelded at the buyer's request at additional cost if preferred. Pictures as a foal with dam and a separate photo of his sire.
Currently standing around 13hh. Sire is 14.3hh. A fantastic mover. Please ask for videos.
Price: £2,000 £1,500 ono
Location: Essex
Contact: Louise
11.1hh ride & drive mare, 5 years old. A lovely little mare with a safe, sensible and genuine nature. Absolutely brilliant little driving pony and drives happily in either quick hitch or a full britchen set.
Easy to catch, wash and load, and generally a really good all-round little pony. She's been in the heaviest of traffic and will stand and wait all day at a junction — very sensible in traffic.
Plenty of looks and lots of hair too, with a big long mane and thick feathers. She also rides under saddle and responds nicely to the leg. An ideal little pony for someone wanting one to have some fun with as a family. Delivery available.
Price: £1,650 £1,500 ono
Location: Cannock, Staffordshire
Contact: C H Cobs - T
15.2hh cob mare broken and riding, 5 years old. Very nice type, suit any rider.
Ring for more info or WhatsApp for video.
Price: £5,800 £5,600
Location: Ireland
Contact: Kp
All rounder. A quality 2-year-old steel grey filly, currently standing around 13hh and expected to make 14hh+ with ease. A lovely, well-handled youngster with all the foundations in place, ready for someone to continue her education and produce her their own way.
Halter broken. Worming up to date, feet up to date. Easy to load and travel. Respects electric fencing and stables quietly with good manners. She has the potential to excel as a show cob, future driving pony, weight-carrying ridden cob, or a versatile all-round family type. She has a kind nature and is ready for her next chapter.
A genuine young filly with plenty of quality and a bright future ahead. Only available as we can't keep them all. Serious enquiries welcome. Message for further details, photos and videos. Videos and delivery available
Price: £1,750 £1,650
Location: Staffordshire
Contact: C.H.Cobs - T
Splashy yearling colt. To make 13hh. This little man is a real family sort. He loves to be around people. He is great with children of all ages. Not coltish in the slightest and is currently turned out with two mares and doesn't yet know what he is.
Will walk out in the heaviest of traffic and not batter an eye lid. Happy to be on his own or with company. Will equally live in or out. Show potential as you can see he's marked like a map. We had bought him with the potential to ride and drive however he's not going to make the height required.
A good home is a must as this is a very very sad sale and we will be picky as to where he goes. Good to pick up all 4 feet. Wormed up to date. Will stand to be washed. Kids can groom all day. Please message for more pictures. No withheld numbers will be answered. In no hurry to sell as he's such a little cracker. Sensible offers only.
Price: £650 £500 ovno
Location: Norfolk
Contact: Sonia
Yearling dun filly halter broken, loads on and off box won't take much to break in once old enough, make a good ride or drive.
She's a good mover gets it from both parents. Top breeding. She will finish up over 14hh.
Price: £2,500 £2,250 ovno
- Sold
Princess Lulu, a 12.2hh, 5 year old piebald mare. She really is an eye catching little mare with moves to die for and as pretty as they come. She's been a diamond with me and lets the kids pull her around and will stand for a fuss for ages, especially if it's for a scratch.
She is great round the farm and has seen lots of machinery. She is used to the road noise and has been up the road a couple of times - she's as bold as anything. She's a really flashy little thing and would do well in the show ring. We have had her at ours on and off the lead rein and she is doing great either way.
Good to bath and for the farrier, we haven't had the chance to clip her, but I should imagine she won't mind. She is wormed up to date and passported. A quick sale is needed due to losing my grazing and not having enough hours in the day to give to her. She will be a real asset to any yard and will make the best unicorn pony for any little boy or girl. Pm for more info.
Price: £2,750 £2,250 ono
Location: Essex
Contact: Frankie
Jazz is a 16.3hh black 6 year old registered TB mare. Don't see such a beautiful black TB, she has previously raced but wasn't good enough. Since then she has been used as a hack by her previous owner due to 2 young children time has been an issue.
Due to this she has decided to part with her as she's not been ridden from 1 month to the next and she has become nervous riding her. She has not and does nothing wrong she just likes to walk on out hacking.
Jazz stands at a block to mount and hacks out alone or in company. Lovely temperament in and out the stable, great with kids. No vices, would make a lovely all rounder.
Price: £1,000
Location: Wrexham
Contact: Withheld
Friesian stallion Boroque type, 10 years old, for breeding only.
Produces exceptional foals 100% fertile. Priced for quick sale, possible part x.
Price: £3,500
Location: Northumberland
Contact: Michael
Percheron cross ID mare standing at 16.1hh, 11 years old. Been served with Andalusian stallion, sold as broodmare.
Price: £4,000 ono
Location: Northumberland
Contact: Michael
13hh 16 year old mare. More kick than pull. Straight forward mare, went to pony club camp this summer and behaved impeccably.
Enjoys her hacking and very easy and straight forward to have around. Been to arena hires, gallops, jumped, xc, etc...
Serious enquiries only.
Price: £2,250
Location: Hertfordshire.
Contact: Jade
Sad sale but don't have time to bring him on to be the horse I'm looking for so wish the best of luck for whoever will bring him on.
Price: £2,000 ovno
- Sold
Sold by Dragon Driving
14hh 4yo black blagdon gelding. Goes sweetly in the school for his age, hacks very well and goes on the gallops with the race horses.
Been started nicely now ready for someone to continue with. Has previously driven but not with us.
Price: £2,750
Location: Hertfordshire.
Contact: Clare
12hh 5 year old cob gelding. Super likeable pony, loads about him, very straight forward but due to his age is green and low mileage.
Has been arena hires, gallops, xc schooling with us and always been perfectly behaved.
Serious enquiries only to find him a lovely home.
Price: £1,500
Location: Hertfordshire
Contact: Jade
Coloured mare coming 8 years old, just over 14hh.
Price: £1,500 no offers
- Sold
Sold within a few hours this horse sold to someone local
Our Flash is up for sale. He is an extraordinary gelding and it is a very sad sale. With Passport, he is 5 years old coloured gypsy cob, 13.2hh. Fully broken, jumping, easy hacker, hacks alone or in company.
Excellent to box, brilliant for farrier. Amazing around people, animals and traffic and does not spook.
Can you really say a horse is bombproof? This gentleman sure is as close as they come. He is so easy, laid back with the best temperament and patience. This lad will not disappoint.
Price: £3,000 ovno
Location: Tredegar
Contact: Kady
Luna has been in our family since a foal. Well bred from the Penboeth line. She is a well loved, cared for mare who started off in the show ring as a yearling getting a 1st a 2nd and a third and reserve champion. Now that she is of age we have put her to work by backing her and schooling her. She has taken to riding amazingly and is doing an amazing job and very confident in the saddle.
Unfortunately she is too small for our growing teen so she is up for sale to make another rider very happy and we know she will not disappoint. Great to lead, easy to box, brilliant for the farrier. Temperament is brilliant and is confident around people and animals.
She has been schooled for a few months now and is riding confidently. She's been trotted, galloped and cantered. Been up and down embankments and in and out the river. At ease with dogs and traffic.
Price: £2,000 ovno
Location: Tredegar
Contact: Kady
Project cob mare, 6 years old, very loving, genuine and moves beautifully, she is green but willing to do what you ask, I've lunged and long reigned her. Previous owner said she has been broken and I was planning to bring her on this spring/summer but family issues have left me with limited time.
She's really not fulfilling her potential with me and I don't want her to go to waste, I'll be so very sad for to go but I know it's for the best. She's very good in traffic and with farm vehicles, loads and travels well.
Just been wormed and had feet trimmed, catches every time, lives in and out with no issues. She just needs the knowledge, time and care to get her fully up to speed.
Price: £1,600 ono
Location: Saxmundham, Suffolk
Contact: Charlotte
14hh 3 year old half bred filly. Quiet as a lamb, done a good few drives this summer.
Will do about 23mph, easy to catch and shoe. Safe and steady for drives doesn't pull.
Brand new set of shoes on yesterday.
Price: £1,600 ono
Location: Reading
Contact: Adam
White piebald 17 years old Shetland, also have two other ones.
Message on WhatsApp for photos of them.
They have to go together as they have been together for years.
Price: £750 ono each
Location: Cannock
Contact: J
Welsh D stallion, this is not an easy write up as I adore this horse to pieces but he is only up for sale because I want something different. This boy is outstanding. He has movement to die for, he is a show off in all the correct ways. He is broke to drive, he's been on one of the drives and smashed it and still had energy to go again.
He thrives off working and loves his job. He has an amazing bloodline. He is passported as well. Movement to die for. Is good to load, clip, shoe, tie up. He's driven to the beach and loved it as well. He loves to drive and thrives off driving and in work.
I am sadly holding him back from being his best and showing the world how amazing he is. He will thrive in the showing world or carry on in his driven career. If he doesn't sell, I'll get him chopped and keep him as he's such an amazing lad.
Price: POA
Location: Cobham
Contact: Nicole
Wanted horse over 14.2hh+ ideally a cob or something with more woah than go but nothing that's completely dead to the leg. Need something that is suitable for a novice.
Let me know what you've got £1,500. My daughter wants to buy this horse herself it must be safe, ideally local to West Yorkshire unless you can transport.
We can offer a 5* home to the right horse. Ridden is a must, driving as well would be a bonus.
Location: Leeds West Yorkshire
Contact: Lisa