Captain Addison Joe Baker-Cresswell DSO (2 February 1901 – 4 March 1997) was a Royal Navy officer, aide-de-camp to King George VI and High Sheriff of Northumberland.

He is noted prominently for his role as the commanding officer of HMS Bulldog during the capture of U-110, from which an intact Enigma cipher machine was seized.

After Lemp had sunk two merchant ships and the corvette Aubrietia had dropped ten depth charges on him, the U-boat surfaced.

Baker-Creswell had ordered the submarine to be sunk, but suddenly remembered a staff college lecture about searching enemy vessels for 'cipher books' and intelligence.

King George VI told them the capture of the U-110 cipher material had been "the most important single event in the whole war at sea".

[2] Baker-Cresswell then joined the Joint Intelligence Staff in London, before becoming training captain in command of the steam yacht Philante.

In 1943 he was appointed chief of staff to the commander-in-chief, western approaches, Admiral Sir Max Horton, then he went on to command the Royal Navy's East Indies escort force until 1945.

The movie U-571 was based on Baker-Cresswell's capture of the German Enigma machine, with the action transferred to the Mediterranean and the heroes becoming Americans.