About White Diamond Racing


Formed in October 2011, White Diamond Racing offers racehorse ownership at an affordable cost. We give the opportunity to regular racing fans, like ourselves, to be involved in the thrills of racing. Our members enjoy regular updates on the progress of their horse, the full ownership experience at the races, mornings at the yard to see their horses on the gallops, and meeting other like-minded racing enthusiasts.

Meet The Team

Tom Castle

Managing Director

Tom has been an avid horse racing enthusiast since childhood, regularly going to the track with his father. He's worked for the likes of Coral bookmakers, Betfair, and Godolphin, as well as working as a pundit on Betracingnation. Tom's ability to read a race is second to none, his visual understanding of the game is key to the partnership's success.


Tom purchased To The Sky off John O'Shea in a private deal for only £3,000 in June 2014 and sent him to Jamie Snowden in Lambourn. To The Sky went on to have form figures of 12324331 over timber, going from a rating of 97 to 109.

Stefan Fellows

Managing Partner

Stefan picked up the racing bug willing the famous grey 'Oneman' to get up the Prestbury Park hill in the 1998 Queen Mother Champion Chase. This had come after two failed attempts in the Gold Cup.


Stefan always makes the annual pilgrimage to Cheltenham, in fact, he even met his wife there! His racing experience is invaluable to the partnership, he provides us with extensive breeding knowledge and statistics. Stefan is a strong believer in not only finding the right horse but also the right races.

Jason Ryan

Managing Partner

The new kid on the block. However, Jason is most definitely the hardest working member of the team. He's been a great asset to have on board. The All Weather specialist, who is fanatical with numbers, which allows our accounts to always be in order.


Jason fondest memory in racing was when Don Cossack won the Gold Cup in 2016, he told every man and their dog antepost.

Chris Nunn

Managing Partner

The life of the party, Chris brings excellent racing knowledge and enthusiasm to the partnership. Business savvy, the gentleman from Biggleswade always makes our members feel at home.


It's never hard to find Mr Nunn on the track, as he will always have a bottle of Moet by his side!

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