Radcliffe could miss London race

Radcliffe has won marathons in Chicago, London and New York

Paula Radcliffe could miss the London Marathon next season in a bid to go for the "grand slam" of Big City marathons.

Radcliffe has won in Chicago, London and New York. Victory in Boston would match the achievement of Ingrid Kirstiansen - one of her heroines.

"That's the dilemma and the choice I have to make if I decide to go with a spring marathon," Radcliffe said ahead of Sunday's RunLondon.

"It's one of things I'll have to think through when I go on holiday."

Radcliffe leaves to Mexico for a few weeks next Wednesday, less than a month after winning the New York Marathon.

But she insisted she would not be rushed into a decision over whether to compete in the Boston Marathon on 18 April or in London a day earlier.

"It's a case of deciding which one my heart's in and which one I want to run," she said. "Obviously I can't run both of them and it's a decision I have to make.

"I'm having a holiday where I can think about it and, whether it's world cross country or a marathon, I'll decide that on the break."

Radcliffe will not be running competitively at Nike's RunLondon, instead allowing Olympic 5,000m finalists Jo Pavey and Ireland's Sonia O'Sullivan to battle for the top honours.

"Obviously after racing in New York I wasn't ready to run competitively," said Radcliffe, "but I still wanted to take part in the race."

The race begins at 1900 GMT at Surrey Quays and finishes in Southwark Park.