Sorry, my post wasn't very clear. The car has passed its MOT test so is technically road legal.

I have imported a few cars to the UK in the last few years and have never needed an IVA test as have always been able to prove the date of manufacture / first registration, either via original paperwork or a Heritage certificate. For classic cars this has been enough evidence for the DVLA to supply by return of post a registration document and an age related registration plate.

I do not have this information for the Manta so am relying on the US title as the sole means of proving the year of manufacture. Am still waiting to hear if I will need an IVA test or not.