Hello Crash,
It is possible with a Haynes Roadster to get a new registration. We will be doing this with Saturn Sports Cars to put cars on the road with a new reg. Have spoken to Mark Vickers at VOSA and there is no problem with this as long as we follow the strict guidelines as below. It also means that we can put cars through as a low volume car manufacturer at a reduced cost, also can put through other builders cars but would need to be registered as a Saturn Car.
For a new registration you need all parts used to build the car to be new except for one major reconditioned component, whether this be engine, gearbox, differential - you need to have proof that it has been reconditioned to as new condition. You have to be able to prove that ALL components are new via receipts. All this will vastly put your build cost up as you will not be allowed a donor and some parts may be hard to source as a new product, you could still build your chassis and wishbones / uprights yourself as long as you provide receipts for the steel being new. Would it be worth it just to have a new registration when it only matters if you are planning on selling after building.
Have a look below on our website, you are not far from us, and you are more than welcome to come over and have a chat about it if you like. Maybe even on a "Saturn Saturday" for some chat and burger....
Regards....AndyH