That is true, I don't like when people dire fly translate votes from one system to another since the systems distort the type of parties that even exist, never mind who votes for them.

On the other hand, I think this generally underestimates the improvements possible by shifting to a more proportional system.

I'm interested to see how the conservatives manage to introduce some kind of English devolution while at the same time retaining their inbuilt electoral advantages.

Also any article on reform of the UK electoral system should end with "We have an unelected House of Lords that people have a birthright to sit in, and has Bishops. End this embarrassment now".

True, but there's every reason to believe that it would trigger a shift further away from the large parties, making the difference even more staggering.

Tactical voting is a big thing in the UK.

This is a common problem in policy making known as the Lucas Critique[1]. But I don't think that it justifies avoiding any change to the voting system

[1] http://en.m.wikipedia.org/wiki/Lucas_critique