I've priced it all up and while not cheap it's not much more than copper pipes and much cheaper than using 15mm coils of copper!
My only worry is the PEX AL PEX Pope isn't really rodent proof! Any ideas on protecting it?
Thanks for all the replies by the way, helping the enemy (sparks)
Get some cats.
I am also a sparky!
The price is similar but the labour less. Get yourself and angled drill and a nice 13mm wood drill and get drilling. Don't forget the regs surrounding drill holes through joists. Finally, the pipes pull easier when all the holes line up. You are going to want to spend a bit of time marking before drilling.
The next time I do this system, I will be looking to use the buteline pipes and fitting. This is because they are sealed internally I.e pulling JG pipes through joists etc can scratch the hell or of them. This can make it hard to get a good seal because JG seals externally. Also, tighter radius's and 25 gear guarantee.....