Go on approvedindex.com. They are costly but they have leads.
furthermore you can go on digital point forum, site point, web design forum uk etc. all are good for design projects
freelancer.com
elance.com
guru.com
Don't go anywhere you can solve all your Web problems with Gexton. http://gexton.com/website-development/
Check here www.metamorphmedia.co.uk. A name of reliability and my trust.
we are web design company based in UK London and work across the UK and US and looking for the web design leads.we are running our of the leads.
cheers
web design and web development