The M25 is one of the busiest stretches of Motorway in Europe. It provides a strategic route around Greater London serving several key transport hubs, such as Heathrow Airport, Gatwick Airport, ferry and freight terminals. Nine other Motorways connect directly onto the M25 and together serve a wide and densely populated area.

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Testing distances between MSAs on the Western side of the M25 against the maximum distances recommended in Government Policy Advice (Circular 02/2013) reveals the existence of a serious public safety risk that needs to be addressed as a matter of urgency if fatigue related accidents are to be reduced.

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There are 14 routes where the distance between existing MSA facilities exceeds 28 miles (measured from the point at which the driver must make a decision to enter a MSA or continue).

Some of these gaps are substantial; with 9 being 40 miles or more, including 2 gaps of 60 miles or more.