Thanks to the reminder about having a survival bag, rather than a blanket, I went to double check mine.
I thought it was a bag, but had never actually opened it up. It isn't.
So at least I've been saved that embarrassment at kit check.
But .... I'd normally buy something like this on line, and there simply isn't time for delivery.
I don't know where I might be able to buy one in Bradford tomorrow evening after work.
Anyone got any ideas?