The hardier members of my club have continued to dive up to 2 days a week right through the winter, this can be in lake district, capernwray or scottish lochs. The bulk of the club members are in hibernation and I have not dived in UK since October, If its a nice day I will probably dive capernwray on good friday. Talking to uk divers abroad there are quite a number who have pretty well given up diving in the UK. They find the diving better and very reasonably priced in Portugal and the Canaries. It is the weather rather than the water temperature that put me off UK diving. The club went up to a scottish loch about 2 weeks ago, diving was good but the weather was appalling making changing out of the back of vans very unpleasant.