Where the National Highways framework applies geographically
The National Highways network is the strategic road network (SRN): motorways and those A-roads that National Highways manages directly, roughly 4,300 miles out of 245,000 total UK road miles. The SRN includes the M25, M1, M6, M62, A1(M), A14, A2 and a selection of A-roads designated as trunk roads.
The NRS (National Recovery Service) framework rate applies on the SRN when recovery is police-instructed. Recovery that you initiate yourself on the SRN, before police attend, is priced privately, not at the NRS tariff.
The M25 specifically is one of the most heavily managed stretches of motorway in the UK: managed motorway technology, variable speed limits, and a dense network of emergency refuge areas. The recovery framework is correspondingly well-organised, with approved operators positioned to cover zones around the circuit.
