I have great news. It looks like the stupidly overpriced and almost completely worthless Special Delivery Guarantee by 1pm for the letter I sent on Saturday actually wasn't completely worthless . I got an email from the Electoral Services people saying they got my letter and they're allowing it. The deadline is 5pm today and if I didn't choose Special Delivery it wouldn't have made it in time.

So the overpriced £6.60 postage actually made a difference.... that's kinda sad.