25% of the world's land surface.
Yes, it was an effect.
Great Britain gained control of much of Southern Africa during the 1800's
France and Great Britain took control of much of the Middle East.
The area of the UK is a little over 94,000 sq. miles.
30,405 sq miles.
more than one forth of the world's land
That would be none. Great Britain is an island. It didn't change shape.
the british lost so much land
France and Great Britain took control of much of the Middle East.
As a consequence, Britain from then on dominated the seas, a situation that was to last for the next 150 years. It is often said that its most important consequence was that it prevented any chance of France invading Britain. It did that, although Napoleon had already given up that idea some time before the battle.
Hitler wanted to knock Britain out of the war as soon as possible so he could commit his forces to the East. Hitler really didn't care much for France or Britain, his focus was on conquering land in the East for his "Lebensraum".
Great Britain gained control over Canada and France lost it at the end of the French and Indian War.