This is not as simple as it sounds.
The DfT has provided an information sheet about A frames and dollies which can be found here
http://assets.dft.gov.uk/publications/d ... ollies.pdf
It says this:
“A”- Frames
When an "A" frame is attached to a vehicle (e.g. a motor car) and towed by a motor vehicle (e.g. motorhome) we believe the "A" frame and car become a single unit and as such are classified in legislation as a trailer. As a consequence the car and “A”-frame are required to meet the technical requirements for trailers when used on the road in Great Britain.
And also this:
Trailers having a combined axle mass not exceeding 750kg are not required to have brakes fitted. However, if the trailer (regardless of mass) is fitted with a braking system, then all brakes in that system must operate correctly. (my underlining)
Note that they state this as an opinion and not a guaranteed interpretation of the regulations. DfT in the information sheet says:
From the above I hope it is clear that we believe the use of "A" frames to tow cars behind other vehicles is legal provided the braking and lighting requirements are met. However, while this is our understanding of the Regulations, it is only the Courts which can reach a definitive interpretation of the law.
I think this is because they are not sure they are right, and I think they are wrong.
The regulations themselves (The Road Vehicles (Construction and Use) Regulations 1986) say:
Application of brakes of trailers
19. Where a trailer is drawn by a motor vehicle the driver (or in the case of a
locomotive one of the persons employed in driving or tending the locomotive)
shall be in a position readily to operate any brakes required by these
Regulations to be fitted to the trailer as well as the brakes of the motor
vehicle unless a person other than the driver is in a position and competent
efficiently to apply the brakes of the trailer.
Provided that this regulation shall not apply to a trailer which—
(a) in compliance with these Regulations, is fitted with brakes which
automatically come into operation on the overrun of the trailer; or
(b) which is a broken down vehicle being drawn, whether or not in consequence of
a breakdown, in such a manner that it cannot be steered by its own steering
gear.
(incidentally the "broken down" exemption is a red herring - it is a concession only and applies to all A frame towed vehicles regardless of weight)
Note that it is a requirement to operate “
any brakes required by these Regulations to be fitted to the trailer”. As no brakes are required by the regulations to be fitted to trailers with a gross weight of under 750kg then any brakes which exist do not need to be operated. The use of the term “brakes required by these regulations” is clearly worded to exclude any brakes which may exist but are not required by the regulations.
So where do DfT get their opinion from? It may have something to do with the definition of "unbraked trailer" in the Regulations:
unbraked trailer
any trailer other than one which, whether or not regulation 15 or 16 applies to
it, is equipped with a braking system in accordance with one of those
regulations.
This means (possibly) that an under 750 kg trailer which is exempt from the braking requirements but has brakes is not classified as an "unbraked trailer". Even so there is no reference to unbraked or braked trailers in the relevant regulations.
Does anyone know any different?