I'm still registered at where my folks' live in Stone which was a super safe Tory seat even in '97 where Bill Cash is the MP. The guy is a loon on some of his views (imo) but he takes his local duties way more seriously than most and does actually try and help people and holds regular surgeries. But it does make my vote useless!
remember someone telling me years ago you get good tax free money working for the day in a polling station, can't see anything about it on my council's website, anyone done it or know where to get info?
I did it at the last election, you do 6am to 6pm and I made about £120 then did some vote counting the next morning for a few hours for another £80 or so quid. The latter was pretty funny as all the party bigwigs are watching you like hawks on every ballot. If there was ever one you weren't sure about (or if someone else wasn't sure about) you'd put it on a seperate pile and then the local council officer would announce whether the ballot was spoiled or not, the basis being a clear intent of a vote for a party. Usually it's pretty obvious, so if someone put a cross next to all parties but one and ticked that last one, that would count as a vote. Occasionally there were some very amusing spoilt ballots. After you've done, I think, three elections you can be a Presiding Officer which is what my Dad is doing this year, it just pays an extra £100 or so on the election day and you have to look after the votes and take them to place where they're to be counted at the end of the day.
You should probably call up your local council Byron, usually you have to go to one meeting/training thing before being told which area you'd be sent.