Dude where in wales are you from? I sware there's someone by your name in my old school...
As for your cooling parts im going too be unconventional (
says everyone) and say get 11/8mm tubing and the compression barbs from alphacool. Ive got them and ive NEVER had a leak and can remove my entire water loop out my PC without draining it theyre so secure. The 11/8 compression barbs can be found on ST and watercoolingUK and tygon make the 11/8 tubing. My tubing is actualy from B&Q in cwmbran though. More flexible than the standard alphacool stuff.
Everything else looks fine too me.
Add: Also if you know someone with a de-humidifier. Bam, free distilled water.