Meanwhile, Turnbull's training partner Mark Carroll produced a disappointing performance in Sunday's Flora London Marathon.

BBC: Turnbull's fitness battle

He returned to his Loughborough base last week after training with Mark Carroll in Florida for the previous five weeks.

BBC: Turnbull's fitness battle

Character references from Loughborough coach George Gandy and Turnbull's regular training partner, Irish athlete Mark Carroll was also noted in the panel's judgement.

BBC: Turnbull didn't learn of the positive test for nine months

Jon Brown carries British hopes in the race where he goes up against Spain's European 10, 000m silver medallist Jose Manuel Martinez and Mark Carroll of Ireland.

BBC: Jo Pavey receives assistance after the Great North Run

Hughton's positive appraisal of the striker was echoed by Fulham boss Mark Hughes, who likewise believes Carroll has the ability to make an impact on the international stage.

BBC: Chris Hughton talks up Andy Carroll's England claims

Maik Taylor (Fulham), Roy Carroll (Wigan), Aaron Hughes (Newcastle), Mark Williams (Watford), Danny Griffin (St Johnstone), Ian Nolan (Sheffield Wednesday), Colin Murdock (Preston), Pat McGibbon (Wigan), Kevin Horlock (Manchester City), Keith Gillespie (Blackburn), Damien Johnson (Blackburn), Michael Hughes (Wimbledon), Jim Magilton (Ipswich), Jeff Whitley (Manchester City), Danny Sonner (Sheffield Wednesday), Steve Lomas (West Ham), James Quinn (West Brom), Adrian Coote (Norwich), David Healy (Manchester United), Stephen Robinson (Bournemouth).

BBC: McIlroy rings the changes

Carroll came close to breaking the deadlock in the Magpies' goalless home draw with Fulham, testing keeper Mark Schwarzer with a low 20-yard effort.

BBC: Chris Hughton talks up Andy Carroll's England claims