...Johnson’s religious life has been as chequered as his political career. Baptised as a baby into the Roman Catholic faith of his mother, Charlotte Johnson Wahl, he veered off at Eton into Anglicanism and was confirmed into the Church of England. Little is known of Johnson’s faith in the years that followed, apart from that Chilterns gag: he was busy editing the Spectator, becoming an MP, performing tripwire stunts as mayor of London, and developing a reputation for a rackety private life. But now the radio signal seems to be coming through loud and clear, although it’s been retuned to...