Paula Radcliffe admitted she has a tough decision to make about what event to contest in this summer's World Championships.

Radfcliffe, who comfortably won yesterday's Flora London Marathon, will definitely be in the British line-up in Helsinki this August.

But whether she will be competing over her world-record marathon distance or in the 10,000metres, where she is reigning European champion, remains in the balance.

After excellent performances from Mara Yamauchi and Hayley Haining in Sunday's race, Radcliffe's presence could help steer the Norwich Union Great Britain runners to team medals.

''It does have significance and I'd like to be part of it,'' said Radcliffe.

''Mara ran great and it's good to see Hayley back. She's had a rough time with injury, so it's good to see her running well again.

''If I did the marathon there it would add something to it, but it wouldn't sway my decision either way.''

Yamauchi finished an outstanding tenth with Haining, a former contemporary of Radcliffe before suffering a host of injuries, two places behind.

Olympians Tracey Morris and Liz Yelling have also qualified for Helsinki, although injury forced the former out of the London race, while Radcliffe's Bedford clubmate ran with a calf injury.

Radcliffe said: ''The state Liz was in she shouldn't have started the race so she did well to get around and she can run even faster.

''Now she can't even walk. I haven't seen Hayley but I saw Mara last night and said well done.''

Radcliffe has asked the selectors to include her in the squad.

She said: ''Yesterday was the trial and I've asked to be selected in the marathon.

''I'm very serious that is an option,'' then emphasised the competition for team medals will be a difficult task.

She added: ''You'd have to look at the strength of other teams and to go in there and beat Japan would be very tough.

''But to get a medal for the team would be an achievement.''

Radcliffe has only rest and recuperation on her mind although last night she flew to New York to receive another honour.

Time Magazine has voted her in the top 100 most influential women in the world and she is attending a glittering celebration in the city where she won the marathon only 11 weeks after her Olympic desperation.