There was no chance in 1914 that the UK would enter the war as an ally to Germany. The Asquith government was split on the question of whether to enter the war. But if they entered the war there was no question about what side they would support, and that was the French. And these opinions were shared across not just the Cabinet, they were shared across the Liberal party, the Conservative party, and the public at large as well.

There was simply no interest at all, that I can find, in supporting Germany. Supporting Germany would go against centuries of British policy of not allowing a single power to dominate the continent. And good will toward Germany had been badly eroded by the recent German naval building and subsequent German-British arms race.

If Germany had stayed out of Belgium, it is likely they could have secured British neutrality. But by invading Belgium, they provided the Hawks what they needed to push the rest of the government and public into the pro-war camp.

Robert Massie's excellent Dreadnought covers this final lead up to war quite well.

From about 1904 on there really wasnt any possibility that GB would find common cause with Germany.

In particular this was driven primarily by Germany's aggressive naval expansion, which by 1918 was projected to outnumber the RN is building rates were maintained. Each successive "Naval Law" was seen in Britain as more proof that Germany wanted to be masters not just land, but sea as well, and German refusal to even consider an arms reduction treaty(until it was too late and Britain was obviously out pacing Germany) was taken as proof of their intentions.

The worst test of the Entente Cordial came in 1905 with the Moroccan Crisis, but German intentions of stirring up trouble to attempt to separate the new allies were plain to see and the united front they presented served to strength the new partnership.

It should be noted that the populations of both nations experienced a hardening of feelings as well. In both countries fictional accounts of German invasions were actually quite popular and widely read. And at one point the Kaiser even wrote a private letter to the First Lord of the Admiralty attempting to justify and explain away German expansion. This was seen as wildly inappropriate and an attempt to lull Britain into complacency, it also had the effect of moving King Edward VII out of the limitation camp firmly into the Navalists camp.

The War That Ended Peace: The Road to 1914 by Margaret Macmillan

Massie's Dreadnought, or his general history Castles of Steel are both wonderful

And From Dreadnought to Scapa Flow by Marder is the most complete history of the RN and the nation in the lead up to the war I have found, with Volume I covering from 1904-1914.