Winning the 2012 U.S. election? It was a cakewalk, Vice President Joe Biden joked Tuesday.

Biden appeared to be in good spirits as he joined British Prime Minister Cameron for a national security meeting Tuesday at Downing Street. Cameron and Biden traded pleasantries before the meeting began.

"So you signed up for another four years?" Cameron said, referring to Barack Obama's victory in the November election.

"It was easy, nothing to it," Biden said.

He said he was "delighted" to take part in the British meeting since he spends "half my life" at U.S. security meetings.

Cameron told Biden that the gathering of British military chiefs, intelligence officials and political leaders around table was something new in Britain.

Biden and his wife, Jill, arrived in the U.K. on Monday following visits to Berlin and Paris. In Paris, Biden met with President Francois Hollande and praised the French leader's military intervention in Mali.