Back on topic:
I've just seen a reference, in a rather pompous post on Facebook, to "tactile voting". Is that braille ballot papers for the blind?
The Metro website is telling of huge queues building up outside polling stations in London. When I voted about two hours ago, I walked strasight in, and there were no other voters there.
Edited to add:
Strange coincidence that LR posted about blind people voting while I was typing that. My late wife used me as a proxy when we were married.