Spies: Horrible History you don't learn in school is at the Imperial War Museum, London, until January 4 2015.
Elayne Jude was escorted by her godson (disguised, right) to view it
Camel poo that kills. Exploding rats. Itching powder in submariners' uniforms. Secret messages on the washing line.
Mid-August. Sweltering London seem deserted. But check out the newly refurbished Imperial War Museum on Lambeth Road, and you'll discover Londoners en mass; wriggling, giggling, talking 'Allo 'Allo, dressing up in outsize greatcoats, stamping on hologram rats, crawling through escape hatches, bicycling furiously to power a crystal radio set, and incidentally learning tons about the history of Allied espionage in the second World War.