Also try the PFA at
www.pfa.org.uk. The PFA has to approve any homebuilt to be constructed in the UK and a lot of the wonderful designs you can see elsewhere are NOT approved for the UK market. There is still a bewildering choice of aircraft out there though. You could also reduce your build time by buying a partially completed kit or a rebuild / restoration project.
When you start your build, you will have to be a member of the PFA to register the aircraft and also to get the various stages of the build approved by a PFA inspector.
The PFA Rally is a MUST DO for anybody wanting to build a kit or buy a vintage taildragger. All the major players in the UK kit market will be there and there will also be a lot of finished kits or the aforementioned vintage taildraggers with a " For Sale" sign hanging off the prop. There are quite a few people who enjoy the build process, fly the aircraft for 10 - 20 hours and then sell it to finance their next build project. Beats me why they do it but there's nowt so strange as folks