I've now done the survey
While many of the questions are more than a bit daft, it is possible to be sensible with responses given a little thought. The thing that'll bite though is the eight point rule being used for a purpose it was never designed for, so I've said this on the form:
The Eight point rule is a tool that DVLA uses when a car is substantially rebuilt or altered. It is not a continuous test, for if it was, a lot of higher mileage old cars would have failed as much would have been replaced due to wear and tear.
Accordingly, the sensible approach to the issue of ‘historically significant’ applied to testing would be to take the year of manufacture on the V5c at face value and anything registered with an age before the cut out date should be accepted.
The person who subsequently applies for vehicle tax has to declare the vehicle is in an MOT exempt group. It is known that DVLA are pursuing the issue of incorrect registration so to take the view of leaving it to them is both simple and logical. Anything else would involve costs to both you and vehicle owners and serve little practical end.
Note the sneaky bit about a mileage limit. Daft as it's completely unenforceable as it's not nor never has been a requirement to have a working odometer. So duly pointed out as well.