I too am against AV, yet I would have no problem in voting this bill through. Why? Because it was in the coalition agreement. Simple as that. But that's as far as my support would go. Once it is passed it's then open season, and those of us who wish to defend the status quo mustn't be defensive about putting forward our arguments. But rather than just attack AV, we should explain why FPTP works and why we should continue with it for Westminster elections.
And let's not pretend the political roof will come crashing down over our heads if AV is adopted. We all know that it's actually a tepid sort of FPTP-lite - i.e the least worst alternative to FPTP.
One thing, though, is that I think serious consideration should be given to a threshhold level in any referendum. I suggest this should be based on turnout rather than set an artificially high level for a Yes vote. Say, for example, only 20 per cent actually bother to vote, and only 51 per cent of those vote Yes. You'd have to question whether 10 per cent of the whole electorate voting Yes constitutes a real mandate for an important constitutional change, wouldn't you?