Emergency vehicles get priority if on official business, right? Most government plans have a "Fuel Priority List" in cases of shortages of fuel, for example:
This is the full list of priority purposes:
Performance of functions of the police or the armed forces, or operation of the fire services
Operation of health or social services
Manufacture, processing, storage, packaging, distribution or sale of food, including milk, milk products, animal feeding stuffs, pet foods or salt
Movement or slaughter of livestock for the production of food or of animal feeding stuffs or for veterinary reasons
Essential operations at nuclear sites
Maintenance of water supplies or operation of sewerage and drainage services
Production, supply, distribution or transmission of solid or liquid fuel, gas or electricity in the course of business, or provision of emergency services to consumers of such fuels
Operation of railways, tramways, docks or harbours
Operation of coach or bus services, excluding excursions or tours; airport bus services; and services provided by employers for taking their employees to or from their work in vehicles adapted to carry eight or more passengers
Operation of air traffic control, air navigation and civil airline services or air marine safety or navigational services
Marine safety, navigational, shipping and ferry services
Search and rescue services, including coastguard and lifeboat services
Production or distribution of medical or pharmaceutical supplies
Operation of postal and telecommunications services, including broadcasting, newspaper production and distribution
Transmission of money or of social security and other essential official payments or documents
Movement or delivery of cash or cheques
Operation of payment, clearing or settlement services
Agriculture or horticulture for the production of food or animal feeding stuffs
Operation of fishing vessels
Manufacture or distribution of ice or dry ice for use in the food trades
Essential central and local government functions
Administration of justice, including the operation of prison services and electronic tagging services
Environmental and environmental health services and related emergencies
Funeral services, including cremation
Refuse collection and disposal
Industrial processes involving hazardous or radioactive substances, including transportation
Veterinary services
Operation, including heating, of special schools or colleges for the handicapped
Foreign diplomatic missions for essential purposes.
Ref: BBC News | SCOTLAND | Key services given fuel priority