Rule 279
Disabled drivers. If you have a disability that prevents you from following the above advice in Rules 277 and 278 , you should switch on your hazard warning lights stay in your vehicle and keep your seat belt on call 999 immediately and ask for the police. Alternatively, press your SOS button if your vehicle has one and ask for the police. If you are deaf, hard of hearing or speech impaired, it is recommended that you register for the 999 text service (emergencySMS.net) before making a journey.