Vipersan said:
as its often hard to dry out pipe sufficiently to use yorkshires ...particularly on old pipe..and particularly on cold water systems .
rgds
VS
In my experience 'often' is always ..............had a few failed repairs after draining down a system and not getting the pipe in the area of the Yorkshire joints completely dry despite copious amounts of blow torch, the problem is the more you heat the pipe the more chance you have of evaporating some water further down the run. I always use compression joints now except on a new run, not that I do a lot of plumbing these days.
EDIT
BTW what I was going to post was that we have had freezing rain for the in Lancashire for a few hours now, shame I have not got any skates my driveway it like sheet ice. Was over in Cleveleys earlier and one side of my car was covered in clear ice with hanging icicles even the tyres were covered in clear ice
below is the rain frozen to my double glazed window