The Pope arrived at Archbishop House, behind Westminster Cathedral in central London, at 8.40am followed 15 minutes later, by the Prime Minister.
It is the first time the two men have met since the Pope arrived in the UK. Cameron was attending his father’s funeral yesterday when the Pontiff addressed MPs in Westminster Hall.
Pope Benedict XVI’s meeting with Cameron comes as six men remain in police custody after they were arrested over an alleged plot to attack him.
Five street cleaners were arrested yesterday morning as armed officers swooped on a depot as they prepared to start their shift. Hours later a sixth man was arrested at a home in north London.