We camped in wales last weekend also no ehu, it was cold but we were fine, I had a sleepiungbag, liner, extra blankets , dh had a duvet and also extra blankets.
I think synthetic fibres are not good, they get me so overheated I get all sweaty and then cold. So we got layers of natural fibres like a wool duvet,cotton throw x2, cotton bedspread and silk and cotton throw.
I cant sleep in a bag, just keep getting tangled and trapped. They are the best thing for keeping warm though, well the good ones are. We use a couple of fleece blankets on top of the airbed, kept secured by a fleece topped fitted sheet. We then sleep under an opened out bag and have a couple of fleece blankets on standby. We never use EHU and get no condensation, if it get's a bit cold I wear a long sleeve T shirt and have a thinsulate hat (which I've never worn)
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets