here’s a quip that both Boris Johnson and David Cameron have used – one that shows they are aware of the pitfalls of signing up to a specific religion in secular Britain while also wanting to keep co-religionists on side. Both have said that their Christian faith is a bit like the signal for Magic FM in the Chilterns: it comes and goes. But while Cameron the Christian is a typical nominal Anglican – church is for hatching, matching and dispatching, Christmas and Remembrance Sunday – Johnson’s involvement with religion has been far more topsy-turvy and dramatic. Who would have thought, when he became prime minister in 2019, that he would stop the balancing act and instead become a standard bearer for Roman Catholicism as the first occupant of No 10 to practise the religion?