At the foot of Nelson’s tomb in the crypt of St Paul’s Cathedral is a sentence spelled out in mosaic which reads: “England expects every man to do his duty”.

In Horatio Nelson’s time, doing your duty meant giving your all to the fight to defend Britain: he sent those words as a signal from his flagship HMS Victory on 21 October 1805, at the beginning of the Battle of Trafalgar. But what does the sentiment signal today?