Can any one tell me where the best place is to get wireing bits from eg cable. conectors. fuse boxes etc etc

try the link page, there are a few on there:

http://www.locostbuilders.co.uk/links.php

used a few of them, all ok.

www.bluebeehive.com

www.premierwiring.co.uk

www.vehicle-wiring-products.co.uk


All the above i have used and would use again,bluebeehive i would deffinatly recomend.