You're entitled to have your car serviced outside of the MINI dealer network. However, in order to maintain its manufacturer warranty, the garage must use MINI approved parts and fluids. They should also provide a detailed invoice that shows the car has been serviced in accordance with the manufacturer's standards.

It is also worth noting that servicing your car outside of the dealer network may result in it missing out on software updates, which are usually recommended by the manufacturer and applied by the dealer. You will also find that MINI UK and your local MINI dealer will be less inclined to contribute towards the cost of any out of warranty repairs if you service the car outside of the dealer network.