The Soviet Spy’s Guide to London

Whatever you do, don’t forget your smart luggage – and never, ever meet in smart West End hotels. That was the top secret advice to would-be communist spies in a previously unseen handbook on surviving in 1930s London. The alternative tourist guide to London, compiled to aid infiltration into the UK, has been revealed amid hundreds of MI5 documents published at the National Archives.”

From a terrific BBC report.