Using a Belgian driving licence in the UK
A Belgian driving licence (paper as well as credit card format) is recognised throughout the EU.
When residing in the UK, you have the choice whether to use your Belgian driving licence or exchange it for a UK licence (https://www.gov.uk/exchange-foreign-driving-licence).
If you lose your Belgian driving licence you need to apply for a replacement in the UK, not in Belgium (https://www.gov.uk/apply-online-to-replace-a-driving-licence#before-you-start). Before applying, however, you will need to obtain a certificate stating details of your driving licence from the Belgian commune where you last resided.