大象传媒

John Inverdale is at the Alexander Stadium in Birmingham to present live coverage of the World Championships trials, with the winners of each event effectively booking their places on the Great British plane to Berlin.

Among a whole host of finals on the final day is the women's 800m, which is turning into a real strength for Great Britain. Already this season Jenny Meadows, Marilyn Okoro and Jemma Simpson have got very close to the two minute mark and a handful of rivals are lined up behind them to make this one too close to call.

Elsewhere, the 200m finals is also taking place, and just like the 100m, the men's event looks like it will be a tight affair. Rikki Fifton leads the rankings in 2009 but is closely followed by Gerald Phiri and Dwain Chambers. Ruled out of Great Britain's plans for the relay in Berlin, Chambers may try to double up in the Berlin sprints, but he'll also have to beat his best friend Chritian Malcolm, who won the title in 2008.

And Britiain's most talented multi eventer, Jessica Ennis, is in action in both the high jump and 100m hurdles. It's a measure of her ability and form that she is a red hot favourite to win both.

Commentary comes from Steve Cram, Paul Dickenson and Jonathan Edwards.