It's election day and, at the end of what's seemed a particularly dull and lacklustre campaign, I shall shortly pop down to the polling booth and cast my ballot. I live in a constituency which is in no sense marginal and since I don't support the party of our current MP there is a question as to how valuable my vote really is.
Of course, the important issue is that by casting it, I earn the right to spend the next 4-5 years moaning about whoever does get in!