MrP, he did?!?
Ironically, in 1940 Churchill's having been out of power for so long constituted an advantage. It was inevitable that the Brits would take serious losses as they were militarily unprepared, and since no one could blame Churchill for the policies leading up to WWII...
So let's get rid of Winnie!
POD October 1939. On the way to a meeting the newly appointed First Lord of the Admiralty is killed by a stray German bomb.
April 1940. Lack of advance planning for landing in Norway leaves a few units unprepared for landings, but also leaves them undistracted by a change in plans. The RN, not involved in the planned landings, is unleashed.
Heavy Cruiser Hipper and 4 escorting destroyers sunk by RN destroyer flotilla under Captain Vian as they return from landing German troops in Trondheim.
The Hipper was the proverbial hard-luck ship of the Kriegsmarine, unable to move without suffering mechanical failiure or attracting bombs or torpedos or ramming by HMS Glowworm.
Elsewhere a British squadron overwhelms two German light cruisers and 4 torpedo boats, while the Home Fleet destroys Scharnhorst and Gneseniau.
In the former case a British force including four cruisers actually had the German force caught in port, but due to concern regarding possible German captures of Norwegian coastal defenses...
RESULT: Kriegsmarine crippled. Sea Lion impossible. Hitler must seek some alternatives.
Battle of France: Major changes, evacuation at Dunkirk slower/less intense, @20,000 Brits not evacuated.
Battle of Britain: Invasion not seriously considered, massive air raids only.
Mers Al Kebir: Operation Catapult not launched. Major elements of French Fleet seized by Hitler in January 1941 including 3 battleships(one incomplete) and one battlecruiser.
British do not rush most of available armor to Egypt. O'Connor's successful destruction of substantial Italian forces never takes place. On arrival of Afrika Korps, frontline is in Egypt and not central Libya.
1941: Rommel breaks British forces in Egypt, takes Cairo/Suez Canal. Malta starved into surrender. Greece, Yugoslavia seek accomodation with Hitler.
Barbarossa: Turkey also joins Axis. Fall of Caucasus region occurs.
1942: Pearl Harbor, Japanese victories in Pacific. German summer offensive includes mopping up near Stalingrad. Stalin surrenders, yields Baltic States, Belarus, all of western Ukraine, Armenia, Azerbaijan, Georgia, Kola Penninsula in treaty. British sue for peace with Hitler.
1943 and on: Cold War between US and Germany? US nuclear strike ravages Europe? You decide.