Did the Trojan War really take place? The Foreign Secretary certainly thinks so. ‘The Iliad must have happened,’ Boris Johnson once told me. ‘That description of the Trojans attacking like birds is so chilling, it must be true.’

Boris was referring to the beginning of Book 3 of the Iliad, where the Trojans ‘advanced with cries and clamour, a clamour like birds, cranes in the sky, flying from the winter’s storm and unending rain, flowing towards the streams of the ocean, bringing the clamour of death and destruction to Pygmy tribes, bringing evil and strife at the break of day’.