Andy Graham hasn't got any. I asked a while ago !!!
Do you honestly think someone in the DVLA would know the difference between a genuine, 1970s VIN plate from Lotus and one of the Ebay replicas ?
Being serious I think you've got to recognise you're dealing with box tickers rather than people who are able to think logically, look at evidence and take a decision. It's always easier to request "more tests/data" or reject something if every box doesn't have a tick to absolve you of any thought process and take the decision for you.
Recognising that and knowing that you're not doing anything improper, have full title/ownership and import papers for the cars you're registering, well, I'd just make sure that box was ticked for them. And I'd have a clear conscience; it's not fraudulent because the cars are genuine and that's been accepted by Lotus, the original manufacturer, it's someone who's incapable of taking a decision.
They are arguing about a simple error made almost 50yrs ago which is stupid, more so when you consider the DVLA themselves are hardly paragons of accuracy. As I've mentioned before, when I requested the history for my Elan in 2011 as a classic I received not only my Elan (UAB 807F) but also paperwork for someone else's Hillman Hunter, UAB 807L. So it would seem they have trouble reading their own records....
Brian