would that be the 36.9% of the people that bothered to vote, voted Tory?
I'd say that leaves a wide majority of people who didn't vote Tory.
A good protest, organised in the right way, in big numbers, is always an effective democratic weapon. It needs the numbers, and the coverage.
......and what it will get is a couple of thousand soap dodgers getting kettled followed by the inevitable riot and accusations of Police brutality or if you're really lucky Boris' water cannon.
What it won't do is effect any sort of change whatsoever