undermines the whole concept of a local representative...
in a way that being a labour supporter in the south east, or a conservative in the valleys of wales, or a lib dem supporter.... pretty much everywhere at the next election :-) doesn't?
the first past the post system has given us parties with huge majorities in the commons, with share of the vote in the 30-40% region. yet that minority support gives 100% power to (nutjobs like blair and thatch), say go to war, flog off anything we own, introduce poll tax, make being gay illegal (ok bit of poetic licence), ram through 'anti-terror (anti fredom of speech & ascociation) regulation, the fecking mandy bill FFS, and many many more.
whats even remotely democratic about that?
I'm not the greatest fan of AV, but it will clearly provide results in each constituency that are 'the least disagreeable' candidate with over 50% of voters choosing.
and anything thet results in less disagreeable politicians _must_ be a good move