At the 1983 Midland Bank
Lancashire County Championships, Thomas won the U20 100 m and finished second in the 200 m and 400 m. He was compared with
Paul Dunn, silver medalist at the
1981 UK Athletics Championships. At the British U20 championships in August 1984, Thomas finished 2nd in the 400 m. He debuted in the
800 metres in September 1984, running 1:55.3. Thomas competed at and won several international meets, including qualifying for two meets in China in 1985. Following a stint for the
Iowa State Cyclones track and field team in the U.S., Thomas returned to Liverpool in 1987. Thomas competed at his first continental championship in 1987, placing 4th in his heat at the
European Indoor Championships 400 m. Thomas led off his team to a heat win and runner-up position in the semi-finals, but him and
Todd Bennett were both substituted out by
Derek Redmond and
Roger Black in the finals. Nonetheless, the team won the silver medal, making Thomas the first Liverpool Harrier to medal at the World Athletics Championships or Olympics. Now representing the
Birchfield Harriers, Thomas won his only British senior title at the
AAA Indoor Championships in the indoor 400 m. Thomas qualified for the finals of the 1990
European Champion Clubs Cup, but he did not compete due to work obligations at the Liverpool J.M. Centre. ==Personal life==