It's not often that I find myself agreeing with Norman Tebbit, but when he says...
"If all the parties mill around in the centre ground and the elector feels that it doesn't matter which one he votes for, it won't make a lot of difference, he will probably stay at home.
"We have now got about 18 million people that don't vote and that is close to the total number who vote Conservative and Labour together. That is dangerous.
"Mucking around in the middle ground, you might get one million votes one way or another, but you won't bring those people back into the democratic process."
... it does ring true.
Blair has led the way in value-free politics and Cameron is busily following him down the same route but, when faced with two essentially identical main parties - and a seriously unbalanced electoral system - is it any wonder that voters are staying home in ever larger numbers?