The above link details an interactive story where the Germany Navy is able to defeat the RN and interrupt the supply lines of the BEF. It is in no shape to resist the German Army when they come and the Germans win the war.
A brief summary: A new commander takes over the fleet. After some very indecisive engagements the Kaisers fleet launches a number of raids against Allied targets, in particular a small German force is landed in the UK which has enough time to steal some of the King's hunting trophies. This results in the UK fleet is split up, and when the German fleet finally masses for the push down the channel their command and control of such a large force isn't so good. This plus weather that favored the Germans results in victory for the hun, who in turn lay waste to the channel ports.
And you really should read the linked story, it is very well written.
Now the big point: Is this a plausible chain of events or total nonsense?