London Mayor Boris Johnson said that Russian President Vladimir Putin should "strip to the waist" and take part in the Olympic judo event.
Mr Putin, who holds a black belt in the martial art, will visit Downing Street before heading to the Olympic Park.
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Many areas experiencing bright spells.
The sports both net more than £10 million in public funds but will be forced to make the money go further than previous higher grants.
"We are not afraid." Those were the defiant words of the Prime Minister this morning as she addressed the Commons.