May 6th. You read it here first.
How do we know? A contact whose property is used for General and Local election counts tells me he has received a letter from Whitehall asking him to refuse bookings for May 6th and May 7th and to re-arrange anything he has booked.
So May 6th – a Thursday (thanks Clothilde Simon) – is the one then.
18.24 Update: oh poo. According to a Labour Twitter thing when I posted this excitedly on Twitter, it’s just a local election date. Does this mean I’ve got it wrong? Damn! A scoop would have been so cool. Then again, they could be lying couldn’t they. If it’s Labour? I think I’ll leave the post up, just in case I’m right….