What is it with Nazis? It’s been more than 70 years since their testicularly-challenged leader blew his stupid brains out in a Berlin bunker, yet our obsession with all things Hitler continues.

Ken Livingstone can barely get through a TV interview without referencing him (I have a vision of him shouting out “Adolf!” in his sleep, startling any nearby newt colonies), and the History Channel still pulls in viewers for its nightly serving of “The Secrets of the SS” or something similar.

In the ’70s and ’80s, Hitler was frequently a figure of fun – Freddie Starr, John Cleese and Mel Brooks all raised a laugh with their impressions, swastikas and all.

The noughties heralded a more censorious approach: members of the Royal Family and even MPs found themselves the target of widespread abuse for their choice of Wehrmacht chic.