My email to Julie Lennard didn't mention speed limits at all as I honestly don't believe that is the stumbling block.
I concentrated on like for like in as much that, and I quote from my email, "As you might know, members of the National Caravan Council (NCC) include the likes of the Swift Group, Bailey Caravans and numerous other professional converters and most, if not all of these companies, on an annual basis, undertake several thousand conversions of panel vans making them into small MOTOR CARAVANS and their V5C documents list them as such, yet in most cases their conversions look almost exactly the same as so many privately undertaken conversions which have been rejected?"
Apart from this long paragraph the rest of my email was short and to the point, I will let you know if I receive any response.
Phil