Uh oh. Looks like the Tories are having serious problems with their Vote Source campaign software, which is failing to generate knock up slips of people who are registered but have yet to vote:

This is a message from CCHQ that I’ve been asked to send out to London officers: ‘Vote Source’ isn’t generating knock up slips in committee rooms. Can you urgently ring each user and ask them to stop generating more as it is making the queue even longer! You can generate them from the control room. Vs team working on issue will be fixed soon.

“It would happen on polling day” laments a Tory source…