Secret wartime papers exchanged between MI5 officials bring to light that the Nazis' plans to conquer Britain included a deadly assault on then Prime Minister Churchill with exploding chocolate.
Adolf Hitler's bomb-makers coated explosive devices with a thin layer of rich dark chocolate, then packaged it in expensive-looking black and gold paper, the Daily Mail reported.
The Germans planned to use secret agents working in Britain to discreetly place the bars of chocolate, branded as Peter's Chocolate, among other luxury items taken on trays into the dining room used by the War Cabinet during the Second World War.
The lethal slabs of confection were packed with enough explosives to kill anyone within several metres.
But Hitler's plot was foiled by British spies who discovered they were being made and tipped off one of MI5's most senior intelligence chiefs, Lord Victor Rothschild.
Lord Rothschild, a scientist in peace time as well as a key member of the Rothschild banking family, immediately typed a letter to a talented illustrator seconded to his unit asking him to draw poster-size images of the chocolate to warn the public to be on the look-out for the bars.
His letter to the artist, Laurence Fish, is dated May 4, 1943 and was written from his secret bunker in Parliament Street, central London.
The letter, marked 'Secret', read, "We have received information that the enemy are using pound slabs of chocolate which are made of steel with a very thin covering of real chocolate."
"Inside there is high explosive and some form of delay mechanism... When you break off a piece of chocolate at one end in the normal way, instead of it falling away, a piece of canvas is revealed stuck into the middle of the piece which has been broken off and a ticking into the middle of the remainder of the slab," it said.
"When the piece of chocolate is pulled sharply, the canvas is also pulled and this initiates the mechanism," it added.
The letter was found by Fish's wife, journalist Jean Bray, as she sorted through his possessions following the artist
