Guy was born on the 17th November 1974 in the Royal Gwent Hospital with his twin sister Hannah who now works for Channel Four Racing as a PR consultant. He also has another sister Zoe who is 18 months his senior. His parents, Roger and June were both successful amateur jockeys in their own right, and the passion for horses has undoubtedly followed in the blood lines. While at school in Monmouth Guy competed in show jumping and cross country events all over the country with success. In his school summer holidays Guy often went to Newmarket to ride work for numerous leading trainers including Ben Hanbury and Micheal Bell. At sixteen he rode his first winner as an amateur point to point jockey resulting in Guy riding a total of six winners and in return winning the Champion novice jockey in the country.

The following year Guy rode his first winner under rules on Ketti at Sandown on the televised Imperial Gold Cup day. The outcome was a frenzied hype about Guys ability as an up and coming jockey and lead to the likes of Martin Pipe and Jenny Pitman using his services.

Guy proceeded to join trainer Phillip Hobbs and rode as stable amateur for two seasons before turning professional and joining, the then up and coming trainer Paul Nicholls as second jockey to Graham Bradley. In 1996 Guy had his first ride in The Grand National falling at the 19th fence when very much in contention onboard Brackenfield. He also travelled to The Czech Republic to ride in The Velka Pardubice and Norway to ride during the summer months.

That same year, Guys good friend Richard Davis was killed in a fall at Southwell races. At the time Richard was planning to publish a copy of a diary he had written throughout the previous season. It was never published Guy was asked to write a chronicle on his year in the life of a journeyman jump jockey and it was published the following year called To Win Just Once. The book was a great success finishing as one of the leading sporting books of the year and all proceeds went to the Injured Jockeys Fund. Guy continued to ride for another four seasons as a freelance; riding for over 100 trainers and continued to make an impact. Throughout his riding carrier Guys weight was always an issue as at nearly 6ft tall strict dieting was paramount.

The final year was a struggle and with only a hand full of winners to his name he decided to retire and was handed a job as a sports broadcaster for Ladbrokes Live Radio. Guy's career as a broadcaster has resulted in him covering big festival meetings on the main land as well as across the water in Ireland. He has also worked for numerous production companies and was a regular on At the Races and Sky Sports. He travels to various tracks around the country tipping in private boxes and guest speaking at different sporting events. Guy is now a familiar voice on Sports Live Radio and along with other business interests continues to tip winners write form pointers and put smiles on listener's faces. Horseracing remains his passion.