If you want to build then look at the various Lotus Seven clones available such as the MK Indy, MNR Vortx, Raw Striker etc, as well as the enclosed body cars like the Fisher Fury and STM Phoenix which are essentially very similar chassis wise but with enclosed style bodywork. You'll be able to either build or buy something suitable for £10k, so it really depends on where your priorities lie and if you want to build or are just building to get to the end result.
