Firstly, let me say Welcome to the Forum and beware, it IS addictive, (the boating thing AND the forum).
Ive seen this hull somewhere before, cant think where though. As for servos, your best bet if your on a budget would be Futaba 3003 or 3002 servos, thats what i use n they never steered me wrong. Since you based in the UK here are some links where you can find various things you may need. Are you only new to the boat scene or new to the nitro scene aswell?
www.sussex-model-center.co.uk
http://www.prestwich.ndirect.co.uk/
They are good sites, if your wanting servos, SMC is probarbly the better one.
Aidan