Plumbing Bits (GU14)

Hi
Just found a lagged outside pipe did not survive the -6deg frost the other day and split 15mm copper pipe. So I am looking for some plumbing ends, joiners, flexi pipe, 15mm pipe etc that I can repair does not need to be any style ie. solder, clamp or push fit anything will do.
Not too fussed even if older used stuff just as long as I can fix.
Later I will be in need of very long length of plastic water pipe so I can re-route in one run.
Many Thanks to anyone that can help.