Can Anyone Help - Who Is Biscuit ?

Today, I was contacted by a lovely Lady named Laura.
She is trying to trace any information on her Rescued Miniature Shetland Pony, who is called Biscuit.
Biscuits story is that he was found around 2006/07 . Laura was told, by the rescue centre, that he had been thrown out of a transit van, over a 5 bar gate into a farmers field and dumped. He was taken to a small family owned rescue centre in Kent (which closed down last year). But he wasn't Micro-chipped, which he is now. Laura got Biscuit from the rescue centre 3 years ago in July 2008 and has spent lots of time, building his trust in people again. The first three pictures are from Laura's & Biscuits first show last weekend. As you can see he is a much loved Pony now.
Biscuit is around 31-33 inches tall and was an entire Stallion when dumped. The rescue centre had him gelded, and their Vet estimated his date of birth as approximately 1998.
Laura would really like to know his history and also be able to register him with the Shetland Pony Stud Book Society.
Laura is sure he was once owned by some nice people and was maybe stolen to cover mares and then dumped. She contacted me, as on reading my blog, she saw, that we came from Kent and wanted to know if we'd lost or had a Pony Stolen.
So does anyone recognise him? or have any information that could help Laura, track Biscuits breeding?
Any help would be gratefully received.