How powerful is your vote? There's now a new website which can tell you.
In the 2005 election, more than half of all voters voted against their winning MP. There were an estimated 25 million wasted votes, which were 'thrown away' .
In the absence of a proportional voting system, in the UK, the voters with real power to choose the government are those who live in marginal constituencies, and these are who the main parties and media focus on.
Some fun statistical analysis by the nef  (the new economics foundation) shows that one person in the UK does not really have one vote...
...it's more like 0.25 votes.
In some ultra safe constituencies the value of your vote falls to practically zero.
You can find out how 'powerful' your vote is by typing in your postcode at a new website: http://www.voterpower.org.uk/