So as there are no limitations and OP corrected Hitler to Germany:
Germany wins WWI by starting east. Brittain join the war a few monts later than OTL citing a small naval incident as casus belli. Russia collapses and is out in 1916, goes red, France capitulates in 1917. Brittain continues the war till 1919, one of their moves is to attack the french fleet before the germans can get it. This creates an aura of hatred between the two of them. Germany and Brittain finally make an uneasy peace where both accepts the status quo after the fighting - Germany gets back some of its colonies but most is lost. Germany starts an even more serious naval race as soon as it can afford it. France hates the british nearly as much as the germans till the great depression comes. Germany helps to bail out France from it and a continental block is created with an anti british edge - both economically and militarily. Any remaining repercussion of the WWI peace treaty is lifted of course. France too starts a naval build up which alarms the british. Tensions mount, war finally breaks out in 1937. The royal navy suffers a serious but not decisive defeat in 1937 from the joined German-french fleet. Peace talks follow but Churchill refuses to accepts the demands of the allies. 1938 passes with colonial fighting and franco-german preparations for a landing operation. In 1939 spring the royal navy suffers the decisive defeat of the war. Brittain is ready for peace but the allies at this point demand the occupation of Brittain. Talks fail and in the summer of 1939 the landing happens. In september 1939 London capitulates to the besieging german-french forces.