Vehicles that are exempt from SRT requirements

The following vehicles are considered to have a low risk of rollover and are therefore exempt from SRT requirements:

Rigid vehicles fitted with a turntable coupling to tow a semi-trailer, provided they don't have a deck or a body for carrying a load (these are usually called 'tractor units')
Vehicles (including their loads) that have dimensions greater than standard or have axle weights greater than a vehicle axle index of 1.1, provided such vehicles comply with the relevant legislation and the conditions of any permits they need to operate outside the standard dimensions and axle weights
Construction vehicles being used on roads that are designated 'road construction zones' under the Heavy Motor Vehicle Regulations
Construction vehicles being used on roads designated 'road works zones' by a road controlling authority
Special vehicles that are not usually used on roads but that have been authorised to cross a particular road by a road controlling authority
Motor scrapers and similar vehicles that are designed for transporting bulk materials and only move along roads without a load.
Vehicles with tipping load bodies, but only when they are in the process of discharging their load by tipping up their body and moving at a speed of up to 10 km/h. When the load body isn't tipped, these vehicles need to comply with SRT requirements
Vehicles engaged in a vehicle recovery service that are designed to tow or transport disabled heavy vehicles
Vintage or veteran vehicles first registered before 1 January 1940.