It was a difficult watch. Previously, we have seen him robed and mitred in gold. He has been one of the great and good, who presided over both the late queen’s funeral and the coronation of our present king. But now the man feels naked, interviewed in civvies, sweating freely and with a large elephant in the room. ‘So why didn’t you do anything about the serial abuser, John Smythe?’ asks Laura Kuenssberg, in this set-piece interview for the BBC. Former Archbishop Justin Welby was brought down by Smythe, the …