How to register a home built car with DVLA?

[rdi]

I would like to construct a 1930's style open top sports car (something akin to the Jaguar SS100), based on the mechanicals of a more modern Jag (I have been offered an XJ40 which might be suitable) I propose constructing an appropriate chassis with aluminium bodywork. It will be a retirement project & is expected to take 5-10 years to complete. Having read some background information on this forum, it appears the project could be challenged at the first hurdle with regard to registering it for use on British roads.
Is there any advice you could give me as to how I can achieve my goal?
Thank you.