here's the full requirements for re-builds:
75. Where there is sufficient evidence of the original identity of a vehicle, it may retain its original mark if the application is supported by documentary evidence and is authorised by one of the historic vehicle enthusiast clubs.
76. However, there may be instances when a vehicle has been built as a faithful reproduction of a classic vehicle, using parts which have been sourced from more than one vehicle.
77. In order to qualify for registration as a Reconstructed Classic, the completed vehicle must comprise of all genuine period components, of the same specification, all over 25 years old. The vehicle is allocated a non-transferrable, (this does not prevent a registration mark being transferred onto the vehicle) age-related registration mark and the date of manufacture is based on the youngest vehicle component. The vehicle will qualify for exemption from vehicle excise duty if the components were manufactured prior to January 1973.
78. The historic vehicle enthusiast clubs play an important part in this process as they have to verify that all the components used in the build are over 25 years old and are of the correct specification.
79. The Reconstructed Classic category generally relies on the honesty of the applicant and the integrity of the enthusiast club in allowing these vehicles to be registered with an age-related mark rather than a Q registration mark. The vehicles are not physically inspected by DVLA.
80. The objective of the inspection for this category of vehicle is to allow vehicles which are built from parts and purport to be ‘classic’ to be registered, whilst providing consumer protection.