Regulation 101 Unbraked trailers
(1)
Subject to paragraph (2), a person shall not use, or cause or permit to be used, on a road an unbraked wheeled trailer if—
(a)
its laden weight exceeds its maximum gross weight; or
(b)
it is drawn by a vehicle of which the kerbside weight is less than twice the sum of the unladen weight of the trailer and the weight of any load which the trailer is carrying.
(2)
This regulation does not apply to—
(a)
an agricultural trailer;
(b)
a trailer mentioned in paragraphs (b), (d), (e), (f), (g), (h), or (i) of regulation 21(3).