Prime Minister says that he is struggling to live with the revelation . Comment: The US government has been spying on its own citizens for a long time, and it's not just NSA or CIA doing this ; they're also using other agencies like FBI ( which was Walliams has been a frequent visitor to Number 10 in recent years .
Prime Minister says that he is struggling to live with the revelation . Samantha Cameron says David Walliams 'the funniest man she 'd ever met ' Follows survey of favourite Davids to mark St David 's Day this week . Walliams has been a frequent visitor to Number 10 in recent years .