London Marathon chief executive Nick Bitel insists that the costs of ensuring athletes made it to the startline could be absorbed by organisers.

BBC: Britain's Mara Yamauchi arrives in London for Marathon

London Marathon chief executive Nick Bitel said that more than 100 doctors were out on the course, including some of the world's leading medical experts.

BBC: Runner dies after London Marathon

Earlier, London Marathon chief executive Nick Bitel said that more than 100 doctors were out on the course, including some of the world's leading medical experts.

BBC: Runners brave marathon heatwave