You don't need your Polling Card to be able to vote.
If you have recently moved house - if you've registered at your new address you can vote there. If you've not, it may be worth heading back to the polling station for your previous address, you might still be registered there. If you ring the relevant councils before 5pm, you should be able to get through to the Electoral Registration section, who will be able to tell you if you are on the register. Otherwise, just go to your local polling station, the staff there are happy to help.
If you're a postal voter and you've not sent your postal vote in yet, deliver it to any polling station in your voting area before the close of poll, and it will be counted. If you've lost it, get to your council's town hall before 5pm and they will be able to issue you a new postal voting pack.
If you have a medical emergency before 5pm, you can get a emergency proxy vote. I don't know what hoops you'll have to jump through to get this though. Sorry!
Please do go and vote, even if all you do is spoil your papers. The number of spoilt papers is counted, so it is an effective way of saying none of the above to an extent.
Quick things that people ought to know before voting!
http://www.londonelects.org.uk/im-voter/where-vote - London Elects tells you where you can vote
http://www.londonelects.org.uk/im-voter/how-vote - London Elects explains how to vote
You don't need your Polling Card to be able to vote.
If you have recently moved house - if you've registered at your new address you can vote there. If you've not, it may be worth heading back to the polling station for your previous address, you might still be registered there. If you ring the relevant councils before 5pm, you should be able to get through to the Electoral Registration section, who will be able to tell you if you are on the register. Otherwise, just go to your local polling station, the staff there are happy to help.
If you're a postal voter and you've not sent your postal vote in yet, deliver it to any polling station in your voting area before the close of poll, and it will be counted. If you've lost it, get to your council's town hall before 5pm and they will be able to issue you a new postal voting pack.
If you have a medical emergency before 5pm, you can get a emergency proxy vote. I don't know what hoops you'll have to jump through to get this though. Sorry!
Please do go and vote, even if all you do is spoil your papers. The number of spoilt papers is counted, so it is an effective way of saying none of the above to an extent.
I hope that this is helpful!