oh my god that is Troy. His owner is driving him, his name is Wagger. No i worked at Newham Riding School for the disabled, at the time it was run by Linda Greaves (obe or mbe). Sadly I learnt that she passed away a few years ago. (even though she treated me like s**t, i think it is a sad loss to the equestrian world).
The people that bought Troy had him in a stable that caught fire hence he was named Survivour. He was sold to Wagger but the people that originally had him never had one as good as him. as his stables caught fire and he survived. His owners never had a winner like him again and i think that they regretted selling him. I had never heard of Rainhill Stud before i never knew that it was where Troy came from. Well i never.
I also looked after a horse called Holygrove Playboy, he was a welsh section D but a palomino and i loved him too. (just incase you find a picture of him !!)