Broadcaster Stephen Fry has urged David Cameron to support moves to strip Russia of the 2014 Winter Olympics because of its new anti-gay laws.
In an open letter to the PM, the International Olympic Committee and London 2012's Lord Coe, he said Russia was "making scapegoats of gay people".
The government said it was working closely with organisers to ensure the Games were free from discrimination.
In Russia, it is illegal to give under-18s information about homosexuality.
In Mr Fry's letter, which was published on his website, he compared the situation to the decision to hold the 1936 games in Nazi Germany.