Rule 263
Unless directed to do so by a police or traffic officer, you MUST NOT reverse along any part of a motorway, including slip roads, hard shoulders and emergency areas cross the central reservation drive against the traffic flow. If you have missed your exit, or have taken the wrong route, carry on to the next exit. Laws RTA 1988 sect 35 as amended by TMA sect 6 , MT(E&W)R regs 6 , 8 & 10 , & MT(S)R regs 4 , 5 , 7 & 9