A lady at my mum's church as just loaned one from the veteran horse society or veteran horse rescue - somewhere like that. He's a 27 yr old gelding who needs 2 - 3 hrs work a week to keep him happy.
A friend of mine has one for sale, 19, bombproof, solid but not a cart-horse, about 15hh, they're not giving it away though ! Its in Wilts, Pm if interested.
Know of a bomb proof nicely schooled 18 year old who may be available for full loan - PM me if you're interested, really nice boy, 100% and good to do.