Dreadnought hoax

“On 7 February 1910 Clarkson’s employees visited Woolf’s home and applied the stage make-up to Woolf, Grant, Buxton and Ridley, then provided eastern robes. … A friend of Stephen’s sent a telegram to the “C-in-C, Home Fleet” (Commander-in-chief of the vessels defending Britain) stating that “Prince Makalen of Abbysinia [sic] and suite arrive 4.20 today Weymouth. He wishes to see Dreadnought. Kindly arrange meet them on arrival”; the message was signed “Harding Foreign Office”. Cole had found a post office staffed only by women, as he thought they were less likely to ask questions about the message. Cole, with his entourage, went to London’s Paddington station where Cole claimed that he was “Herbert Cholmondeley” of the Foreign Office and demanded a special train to Weymouth; the stationmaster arranged a VIP coach.

In Weymouth, the navy welcomed the princes with an honour guard. An Abyssinian flag was not found, so the navy proceeded to use that of Zanzibar and to play Zanzibar’s national anthem. The group inspected the fleet. To show their appreciation, they communicated in a gibberish of words drawn from Latin and Greek; they asked for prayer mats and attempted to bestow fake military honours on some of the officers. Commander Fisher failed to recognise either of his cousins.

The hoax was widely reported, and the navy mocked

When the prank was uncovered in London, the ringleader Horace de Vere Cole contacted the press and sent a photo of the “princes” to the Daily Mirror. The group’s pacifist views were considered a source of embarrassment, and the Royal Navy briefly became an object of ridicule. The navy later demanded that Cole be arrested. However, Cole and his compatriots had not broken any law.”

https://en.wikipedia.org/wiki/Dreadnought_hoax