From that linked article: The registration paperwork was sent off to the DVLA on the 6th or 7th of May, which would mean it's been with them for around two weeks now... I spoke to them (the DVLA) a few days ago and it transpires that as I already have a number plate - R500 WOT (WOT=wide open throttle) that provided I can prove the documentation was delivered to the DVLA by way of signed for recorded delivery from Royal Mail I'd actually have a 14 day grace period to use the vehicle WITHOUT the need for a V5 or tax disc, however, if the paperwork isn't back with me after the 14 day grace period expires I'd have to stop using the vehicle. The point I'm trying to make is that any future builders that don't want to wait to drive their cars once the IVA has been approved, should purchase a private plate in advance and then can use their cars as soon as they can prove the documentation has been received by the DVLA - amazing, but true! Are you in exactly the same position? Jonathan