Radcliffe bid: Cram's verdict

"My main focus is the marathon," said the 31-year-old Briton.

"The 10,000 is the lesser thing and can be dropped but at the moment I'm hoping I can have a good run out there and move on to the marathon strongly."

Darren Campbell was named captain of the Great Britain team after being included in the 4x100m relay squad.

Radcliffe is tempted to try and double up despite her disappointment at the Olympics last year.

She was a strong favourite for the marathon but failed to complete the course and then subsequently failed to finish the 10,000m.

"I don't think anything's going to make up for or change last year," said Radcliffe.

"Last year happened, I'm never going to be happy about it but I've moved on from it and put it behind me."

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Radcliffe, who has recovered from a back problem which was hampering her earlier in the year, insisted her decision to double up again was purely for practical reasons.

"It's nothing to do with last year. It was just something that was offered this year by the timetable," said the 31-year-old.

The 10,000m takes place on the first day of the World Championships on Saturday, 6 August, with the marathon on Sunday, 14 August.

Campbell, bronze medallist at the last World Championships, failed to reach the 100m final at the British trials but his inclusion means the Olympic gold medal-winning quartet from Athens are all present.

Marlon Devonish, disqualified from the 100m trials after a false start, will join Jason Gardener and Mark Lewis-Francis in the shorter sprint, and double up in the 200m.

Williams wins GB spot

Wales' European Under-23 hurdles gold medallist Rhys Williams is selected for the 400m hurdles, while Phillips Idowu will join Nathan Douglas in the triple jump if he proves his fitness.

Olympic heptathlon bronze medallist Kelly Sotherton will also compete in the individual long jump as well as her main event.

Great Britain have been hit by a series of withdrawals and the 52-strong is less than in previous years.

Kelly Holmes, Hayley Tullett and Chris Rawlinson are some of the athletes that have pulled out.

Great Britain and Northern Ireland team for World Athletics Championships in Helsinki, August 6-14.

Men:
100m: Marlon Devonish (Coventry Godiva), Jason Gardener (Bath), Mark Lewis-Francis (Birchfield)
200m: Marlon Devonish (Coventry Godiva), Chris Lambert (Belgrave), Christian Malcolm (Cardiff)
400m: Tim Benjamin (Belgrave), Malachi Davis (Woodford Green & EL), Robert Tobin (Basingstoke & Mid Hants)
800m: James McIlroy (Windsor, Slough EH)
1500m: Michael East (Newham & Essex), Nick McCormick (Morpeth)
3000m steeplechase: Andrew Lemoncello (Fife)
110m hurdles: Allan Scott (Shaftesbury Barnet)
400m hurdles: Rhys Williams (Cardiff)
High Jump: Ben Challenger (Belgrave)
Long Jump Chris Tomlinson (Newham & Essex Beagles)
Triple Jump: Nathan Douglas (Oxford City), Phillips Idowu (Belgrave) - subject to fitness
Shot put: Carl Myerscough (Blackpool)
Javelin: Nick Nieland (Shaftesbury Barnet)
Marathon: Huw Lobb (Bedford), Dan Robinson (Tipton)
4x100m relay: Darren Campbell (Sale Harriers), Marlon Devonish (Coventry Godiva), Jason Gardener (Bath), Chris Lambert (Belgrave), Mark Lewis-Francis (Birchfield), Christian Malcolm (Cardiff), Craig Pickering (Milton Keynes)
4x400m relay: Tim Benjamin (Belgrave), Malachi Davis (Woodford Green & EL), Graham Hedman (Woodford Green & EL), Martyn Rooney (Croydon), Robert Tobin (Basingstoke & Mid Hants), Rhys Williams (Cardiff AAC).

Women:
100m: Emma Ania (Shaftesbury Barnet)
400m: Donna Fraser (Croydon, Lee McConnell (Shaftesbury Barnet), Christine Ohuruogu (Newham & Essex Beagles)
800m: Susan Scott (Glasgow)
1500m: Helen Clitheroe (Preston)
5000m: Kathy Butler (Windsor, Slough & Eton), Jo Pavey (Exeter)
10,000m: Kathy Butler (Windsor, Slough, Eton), Paula Radcliffe (Bedford)
3000m steeplechase: Jo Ankier (Shaftesbury Barnet)
Marathon: Hayley Haining (Glasgow), Debbie Mason (Tipton), Paula Radcliffe (Bedford), Mara Yamauchi (Harrow)
100m hurdles: Sarah Claxton (Woodford Green and Essex Ladies)
400m hurdles: Nicola Sanders (Windsor Slough &EH)
Pole Vault: Janine Whitlock (Trafford)
Long Jump: Kelly Sotherton (Birchfield)
Hammer: Shirley Webb (City of Edinburgh)
Javelin: Goldie Sayers (Belgrave)
Heptathlon: Kelly Sotherton (Birchfield)
4x100m relay: Diane Allahgreen (Traffford AC), Emma Ania (Shaftesbury Barnet), Amina Ceesay (Newham & Essex Beagles), Katherine Endacott (City of Plymouth), Emily Freeman (Wakefield), Laura Turner (Harrow)
4x400m relay: Donna Fraser (Croydon), Lee McConnell (Shaftesbury Barnet), Jenny Meadows(Wigan), Christine Ohuruogu (Newham & Essex Beagles), Nicola Sanders (Windsor, Slough & EH), Kim Wall (Basildon).