Rule 253
Prohibited vehicles. Motorways MUST NOT be used by pedestrians, holders of provisional motorcycle licences, riders of motorcycles under 50 cc (4 kW), cyclists, horse riders, certain slow-moving vehicles and those carrying oversized loads (except by special permission), agricultural vehicles, and powered wheelchairs/powered mobility scooters (see Rules 36 to 46 inclusive). Provisional car licence holders MUST NOT drive on the motorway unless they are accompanied by a DVSA Approved Driving Instructor (ADI) and are driving a car displaying red L plates (or D plates in Wales) with dual controls. Laws HA 1980 sects 16 , 17 & sched 4 , MT(E&W)R regs 3(d) , 4 & 11 as amended by MT(E&W)(A)R 2004 & MT(E&W)(A)R 2018 , R(S)A sects 7 , 8 & sched 3 , RTRA sect 17 & MT(S)R reg 10 as amended by MT(S)(A)R 2018