That depends. If a London-Berlin alliance happens - Would France and Russia ever get a feeling of being backed into a corner or a closing window of opportunity to as they weaken, leading them to strike out? Would the British or German-Austrians decide to start a world war, "for fun" against France & Russia to pick their empires apart, a world war that would probably be quicker and less costly than OTLs, but still more costly than anybody expects?
As far the possibility of a London Berlin alliance in the first place: Can London get over itself, and joint the Triple Alliance or Three Emperor's League on the same terms as everybody else? Or failing that, could Germany accept a special lopsided alliance on terms favorable to Britain, without feeling its being taken advantage of and set up for suffering as Britain's meat shield like Frederick the Great was in the 7 Years War? Failure to overcome those limitations prevented said alliance in OTL in addition to any concern about raw 'balance'.
Time would be on the Franco-Russian side here, no? So, why spark a World War in, say, 1914 when you could wait until, say, 1940 or 1950 to do so, when your own side will be stronger relative to your enemies?
Are you sure that India was on the independence path prior to WW1? I thought that was more the result of WW1, since that dramatically changed relations between the Indians and Britain. Not that Dominion status wasn't coming eventually, but that if the process was slower India likely would have been more closely tied to Britain and the empire.
No partition?