You have the freedom to decide where and by whom your car is serviced. In the UK, car manufacturers are obliged to provide a minimum two-year unlimited mileage warranty on all new cars, irrespective of ownership changes. Importantly, they cannot compel buyers to use their official dealership network for servicing.
Consequently, manufacturers are prohibited from voiding a warranty simply because a car was serviced elsewhere, under the European Union Block Exemption legislation. This legislation, though the UK has exited the EU, remains in effect.
However, manufacturers retain the authority to establish a servicing schedule that owners must follow. Therefore, if you opt for an independent mechanic instead of the main dealer, ensure your service book is stamped, maintain records of all work performed, and insist on approved parts and lubricants as per the manufacturer’s specifications.