Former drugs cheat Dwain Chambers has won his 100m heat in a season's best time of 10.02 seconds - faster than Usain Bolt's qualifying time.
The crowd greeted his appearance with a huge roar of approval.
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Labour have lost the Copeland by-election, a seat they had held since 1983, as the Conservatives edged the vote by 2,000 votes.
Labour have held onto the crucial seat of Stoke-on-Trent, brushing aside UKIP leader Paul Nuttall in the process.
A highly toxic chemical was used in the death of North Korean leader Kim Jong-un's half brother last week, tests have shown.