So if you are moving to the UK from a country that has cars with steering wheels on the left-hand side, you are strongly advised to consider buying a UK car, rather than importing your own. Safety reasons are the most important. But, there are also practical reasons, for example if you need to take a parking ticket on the right hand side of your car. Selling an imported car with steering wheel on the left-hand side after living for a while in the UK is also rather difficult. It is possible, however, to import your left-hand car in the UK and to register it there.
Many people drive with relatively new cars in the UK since many employees have company cars.
In the UK license plates belong to the car rather than to the owner which means that a car usually keeps its plate from when it is registered until it is taken out of service. Many people want to be seen driving a car with the latest letter so new cars with last year's registration number can be bought for a lot less. Although registration plates usually stay with a car throughout its life, it is possible to change them, and so you will notice special plates. These are not specially-ordered, but in fact someone finds a registration that they like, and then pay to have it changed to their car.