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State and royal cars of the United Kingdom are kept at the Royal Mews, Buckingham Palace. A distinction is made between the State Cars and other vehicles.
The State Cars are used for public engagements and on ceremonial occasions by the Queen and those representing or supporting her as head of state. There are currently five State Cars: two Bentleys and three Rolls-Royces. They are sometimes used when the Queen is travelling abroad, and are also made available for heads of state visiting the UK, as well as for use by senior members of the Royal Family on official duties. As these are State vehicles they do not possess registration plates.
There are also two State Royal Review Vehicles , designed for use at military or non-military parades and similar events. These, likewise, do not have number plates.
Other official vehicles kept at the Royal Mews include Jaguar and Daimler limousines , Land Rovers, Range Rovers, luggage brakes and minibuses. These do have number plates, as do the monarch's personal vehicles and those of other members of the royal family.