where abouts in sheffield are you mate?
anyways, bang your heaters on full, pop the cap off your water tank, then start her up, keep filling it until the fan kicks in, when it does check the level is bang on, then tighten up the cap and away you go.
oh yeah, while your filling the collant system, give all the pipes that you can see in the engine bay a good squeezing just to make sure you dislodge any air pockets, but i advise wearing some gardening gloves so you dont burn yourself...again.
if however it starts to boil up out of the cap, then your seal in teh cap has either perished of is damaged, quick trip to gilders, order the new blue cap style and away you go.
probbaly seen you about, need any help, give me a PM... good luck!