Thank you for your email below to the Department for Transport about the speed limit for your vehicle, which has been converted into a motor caravan. I have been asked to respond as my team deals with this policy area.
Please note that I am unable to give legal advice, however I can point you to the relevant legislation and give you the Department’s view.
The national speed limits for different categories of road vehicle depend on how the vehicle is configured for use on the road. The legislation applicable is the Road Traffic Regulation Act 1984, Schedule 6 (see link below), which lists vehicle types which are restricted to speeds below the national speed limits.
Road Traffic Regulation Act 1984
The Department has produced guidance on the various speed limits on the gov.uk website (see link below), which includes advice on motor caravans:
Speed limits
As you will see, a motor caravan that exceeds 3.05 tonnes unladen weight is restricted to lower speeds than the national limits i.e. 70 mph on motorways; 60 mph on dual carriageways; 50 mph on single-carriageways, unless locally marked. If you draw a trailer (or trailers) of any type then lower limits apply.
If a motor caravan does not exceed 3.05 tonnes unladen weight, then it is not restricted to lower speeds than the national limits (i.e. it can travel at the same speed limit as a car).
Motor caravans which carry goods or burden not directly necessary for the purpose of living in the vehicle, would be classed as goods vehicles and subject to current goods vehicle requirements for speed limits.
I assume from the information in your email below that your vehicle has been converted into a motor caravan; so that it meets the definition of a motor caravan (see link below) and that DVLA have said they cannot change the body type on the vehicles V5C registration form to ‘motor caravan’ but to “van/side windows”.
Internal features for motor caravans
We have been informed by DVLA that the body type information held on the DVLA’s records must describe what a vehicle actually looks like. If the exterior of the vehicle does not look like a motor caravan, DVLA will be unable to change the body type. However, vehicle keepers are still able to use the vehicle as a motor caravan provided any alterations made do not compromise the vehicle’s safety.
In addition, if you, as the owner of the vehicle, are satisfied that the vehicle meets the definition of a motor caravan then you can operate it as such and adhere to the speed limit applicable to motor caravans.
I would like to clarify that the speed limit of a vehicle is not dependent on the information on the V5C registration document. It is determined by how the vehicle is configured for use on the road and the applicable legislation mentioned above.