Chambers maintained his unbeaten streak over the distance since running it for the first time in almost two years in Kalamata 10 days ago, and set a season's best of 10.24secs.

The 30-year-old London sprinter – who had a trial with Castleford Tigers in rugby league's Super League just two months ago – finished two metres clear of Leevan Yearwood and Gavin Eastman, his Thames Valley and Enfield & Haringey rivals, who clocked 10.50 and 10.58 respectively.

Chambers, who in his heat and semi-final ran 10.31sec and 10.40sec, missed the Beijing qualifier of 10.21sec, hindered by a 1.5m-per-second headwind.

However, he benefited from the tight three-hour schedule and should easily attain the required standard.

Chambers has yet to announce where he will compete next before the Aviva National Championships, incorporating the Team GB Selection Trials, taking place in Birmingham from July 11-13.

Although the former drug cheat has confirmed he intends taking legal action to overturn his lifetime Olympic ban, no details have been announced of the date he will challenge the punishment.

Chambers has been told by solicitors to concentrate on achieving the Olympic standard and winning the trial race which normally would ensure his selection for Beijing, while they prepare procedural action. However, if he is to realise his dream of competing in China, his legal team must successfully challenge a British Olympic Association bylaw banning athletes who have committed anti-doping violations from ever again running for Team GB.

Liz Yelling continued her Olympic marathon preparations with a third-place finish in the Bupa Great Women's Run in Sunderland.

Yelling, competing on home soil for the last time before contesting her second successive Games marathon on August 17, produced a solid display in the five-and-a-half mile road race.

The Commonwealth bronze medallist could not match the pace of Ethiopian Gete Wami who won the race two years ago and regained the title, finishing 16 seconds ahead of Bahrain's Nadia Ejjafini in 29:20.