[quote=So Boerd]
Just like the US will back up the Phillippines and Japan.
[/quote]

Read about the Entente Cordial, it was what I was talking about at the end of my post.

It was a somewhat secretive agreement between France and Britain that marked the beginning of the end of a feud that had stretched on almost a millennium. This meant that in WW1 Britain got to choose between upholding their agreement with Belgium, Staying allies with France who was not going to threaten their colonies or lose Belgium as an ally, likely feud with France again which means Russia would be more likely to attack India, while dealing with a much stronger Germany with whom they had an inconsistent relationship with(mostly due to a navel arms race which had taken place between Britain and Germany just prior to the war despite being big trading partners.)

Also you can't forget France was a significant trading partner with Britain at the time.