[James]

I don't get the argument about it not being worth voting if you live in a safe seat. If enough people in your constituency share your opinion about who to vote for you will get that MP.

If anything it's not worth voting because you only have one vote out of about 70,000, and even then your vote carries far more weight in the constituency system than if it was a nation-wide system with millions of votes that decided the election, like a referendum.