Consider this: with a 1914 victory for the Entente, Britain suddenly finds its strategy of preventing Germany from becoming the European hegemon turned back on it. Now, France and Russia (who are unlikely to go to war and have a shared interest in keeping Germany down) constitute a hegemonic bloc that dominates the continent. I can easily see a rapid shift in British foreign policy to supporting Germany and the other CP nations, plus the ottomans whether or not they joined, starting with trying to get the minimum punishment in the post-war treaty. The "great game" in central Asia probably reignites full force.