The BEF is destroyed in 1914 via encirclement. The UK decides that while it will run the blockade and engage in colonial and possibly anti-Turkish action in the Middle East, its not going to put an army into Northern France.
Since there is no BEF, there are fewer offensives in the West, which preserves French strength.
The Russians manage to hold on in 1915 through the great retreat. The British score major victories against the Turks in 1915, and by 1916 they are on the verge of marching into Anatolia with the Russians. Also, internal Greek struggles end up with it joining the Entente and Serbia doesn't fall.
In 1916 there is a negotiated peace. Belgium regains independence and the Germans trade their gains in the west for gains in the east, especially a nominally independent but puppet state Poland. Austria Hungary gets something to appease the assassination of the Archduke but otherwise Serbia is kept whole. The UK gains colonies and new protectorates in the middle east.
Again German win.
In 1914 without the BEF, the French could easily lose the 5th Army. But let's say the French commander still does well. Then the Germans win the race to the sea. The line that stabilizes is probably around the Marne, all the way to the sea. Unfortunately for the Germans, the Austrians still need rescuing before Paris can be taken. You now have the HUGE problem that the Germans are operating torpedo boats and U-boats out of channel ports. The Dover blockade can't hold, even though the area is heavily mined. The ports used to supply France are under constant threat.
In 1915, the Germans still steamroll the Germans in the east, but only worse. Yea, the Ottomans are in worse shape, but the Germans don't stop in August, they stop when the snows come. They are 150 to 300 miles east of OTL stopping location, and Russian losses are much higher. The Germans then have the option of knocking either Russia or France out of the war.
You do save the UK finances, but you also lose the war.