Wiz at
http://www.mcmc-uk.com/ (bristol) The site looks all fancy but if you give them a ring then they will do the small amounts you are going to need.
There is also
http://www.ecfibreglasssupplies.co.uk/ who last time I checked were a bit cheaper than cfsnet
steer clear of easycomposites as they are a bit more high end carbon etc...
If you need loads like 25kg resin and 20m cloth then you could always go direct to huntsman resins and carr reinforcements but they don't supply the bits like brushes etc they are more bulk materials suppliers as they are the importers/manufacturers/weavers
If you have large flatish areas or of gentle single curvature then use corecork, otherwise go for coremat.
Weave types:
Plain is strong but harder to form to shapes
Twill is slightly weaker as they weave allows more fibre movement but it also makes it easier to drape and work into more complex shapes
Uni-Bi and Tri axial are straight fibres which are easily ruined so it may be prudent to steer clear if you are just starting out
If you need to make the mould as well then best to lay up gradually about 2-3mm thick at a time, use a mix of csm and woven.
There's plenty of info on the ECF site, just get stuck in!