12th December is the date in case you have missed the news...
If you have a postal vote there is still time to post it off, or you can drop it into a local polling station on Thursday.
If you have a 'normal' vote, the polling stations will be open from 7.00am until 10.00pm. If there is a queue at 10,00pm, and you are in the queue, you WILL be allowed to vote.
Not sure that any of the candidates suit you? You can always 'spoil your ballot paper' rather than actually voting for anybody.