BOAC Flight 777 is shot down over the Bay of Biscay by German Junkers Ju 88s, killing British actor Leslie Howard and leading to speculation that it was actually an attempt to kill British Prime Minister Winston Churchill.

BOAC Flight 777 was a KLM flight scheduled as a British Overseas Airways Corporation civilian airline flight from Portela Airport in Lisbon, Portugal to Whitchurch Airport near Bristol, England. On 1 June 1943, the Douglas DC-3 serving the flight was attacked by eight German Junkers Ju 88 bombers and crashed into the Bay of Biscay, killing all 17 on board. There were several notable passengers, among them actor Leslie Howard.

The Bay of Biscay is a gulf of the northeast Atlantic Ocean located south of the Celtic Sea. It lies along the western coast of France from Point Penmarc'h to the Spanish border, and along the northern coast of Spain, extending westward to Cape Ortegal.

The Junkers Ju 88 is a twin-engined multirole combat aircraft designed and produced by the German aircraft manufacturer Junkers Aircraft and Motor Works. It was used extensively during the Second World War by the Luftwaffe and became one of the most versatile combat aircraft of the conflict.

Leslie Howard Steiner was an English actor, director, producer and writer. He wrote many stories and articles for The New York Times, The New Yorker, and Vanity Fair and was one of the biggest box-office draws and movie idols of the 1930s.

The prime minister of the United Kingdom is the head of government of the United Kingdom. The prime minister advises the sovereign on the exercise of much of the royal prerogative, chairs the Cabinet, and selects its ministers. Modern prime ministers hold office by virtue of their ability to command the confidence of the House of Commons, so they are invariably members of Parliament.