M275 Breakdown
Recovery Service

The M275 is the gateway to Portsmouth, a 2-mile spur motorway that connects the M27 at Junction 12 to the heart of one of Britain's most important naval and maritime cities. Portsmouth sits on Portsea Island, a low-lying island in Portsmouth Harbour, and the M275 provides the main high-speed approach from the motorway network to the city centre, the naval base, the continental ferry port, and the Isle of Wight ferry terminals.

Portsmouth's significance in British history is hard to overstate. The Royal Navy has been based here since the 15th century, and HMS Victory, Nelson's flagship at Trafalgar, still sits in the historic dockyard. The naval base remains one of the largest employers in the city, and the daily movement of thousands of naval and civilian personnel to and from the base creates traffic patterns tied to military shift schedules rather than normal commuter hours. The continental ferry port handles services to France and Spain operated by Brittany Ferries, and ferry departure times — particularly the morning sailings to Caen, St Malo, and Santander — generate surges of traffic that arrive at the M275 at predictable times.

The Isle of Wight ferries add another layer of traffic demand. Wightlink operates a car ferry from Portsmouth Harbour to Fishbourne on the Isle of Wight, and Hovertravel operates a hovercraft service from Southsea. Summer weekends and school holidays see thousands of cars heading for the island, and the M275 is their last motorway section before reaching the ferry terminal. The motorway terminates at Rudmore Roundabout on Portsea Island, and from there traffic disperses through the city's road network. The Rudmore Roundabout area is constrained by the surrounding built environment and the proximity of the harbour, leaving little room for queuing traffic. When ferries are delayed — whether by weather, mechanical issues, or border control delays — the traffic backs up onto the M275 and can reach the M27 junction within minutes. The flat, coastal geography means sea-level conditions apply: salt air corrodes electrical connections, and sea fog from the Solent can reduce visibility with little warning.