@oralloy,
Some very interesting statistics were quoted last night on Question Time, TV political debate programme.
Apparently the "parliamentary seats per voter number", under our current system, worked out at about 22,000 (Scottish Nationalist) against 4,500,000 (UKIP).
So the system doesn't work well for everybody; which is to say that if your party polls second in every constituency, you could have 40% of the votes cast and end up with nothing.
The Tories want to gerrymander boundaries so as to make less likely any future Labour gains.