The Games could be one the wettest of any summer Olympics if the rain continues and the long-term forecast is for changeable conditions.

Coe admitted yesterday that the weather is causing logistical problems for organisers, but pledged that contingency plans are in place to deal with issues.

“I have joked in the past about putting a roof across the whole country, but let’s be clear, this is actually proving quite a challenge to us. We have got waterlogged sites, resurfacing that is taking place in some areas, particularly in some of the more sensitive and rural sites, Greenwich Park and Eton Dorney,” Coe said.