Thanks Mike, Tony,
I see how it all got into that mess, just another reason to move further out of London, and there are many. Schools should cease to be an issue in the next year or two, and an extra half hour commute will be well worth it.
All I can hope for is that the DVLA change the type without too much fuss, which you would think wouldn't be that big a deal in a sensible world, seeing as it was me that registered it just a couple of months ago, quite obviously incorrectly just on the grounds of the number of seats. It had 6 seats when it was in service and had 6 seats when I bought it!!
if that fails, I'll go down the path of appealing to TfL on the grounds that it is obviously a recreational vehicle, not a commercial, you never know.
Thanks to everyone for their responses, the letter went this morning so I guess it's hurry up and wait!