That depends on the type of vaccine you received for your first dose and whether it is available in the UK. If it is not available in the UK, you will be offered the most similar vaccine. If you register with a doctor (GP – General Practitioner) when you arrive in the UK, you can discuss this with them.
If you do not register with a GP, you can book a Covid-19 vaccination as an unregistered patient through a local doctors surgery and you will need to discuss this with them.