Setting your region is simple as it’s part of the setup process. You’ll be asked to pick your country and then your region by entering your postcode.
How to reset your TV's location
If you've moved or are seeing the wrong regional channels (e.g. BBC England instead of BBC Scotland, or BBC East Midlands instead of BBC Anglia), find the Settings menu on your TV.
Next pick the Language and location option which is usually in the System Menu within Settings. You should be able to change your location and region from there.
This will vary depending on your TV, but you can use the above as a guide!