Application of brakes on trailer

Where a trailer is drawn by a motor vehicle the driver 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 Provided that this regulation shall not apply in the case of trailers which, in compliance with these Regulations, are fitted with brakes which automatically come into operation on the overrun of the trailer.