is this easy as it's made out to be?
i was going to buy one of those outdoor tap kits from B&Q or screwfix
Yes it is easy, but you have to make sure it has a non return vale in it, I personally would not use a tap kit that you screw to cut into pipe .
get a pipe slice, and some push fits, some 15mm copper/plastic. tap and fitting plate.
Or pay a local plumber to do it, if you need to buy all the stuff it will be cheaper
