Whilst you are allowed to drive in Great Britain on your original licence, you can still exchange your foreign licence for a UK one at any time if you so wish. If the EU/EFTA licence that you currently hold was exchanged for a licence from a non-EU country then you’ll only be able to use it for 12 months
Please use this link which would provide you the options and details for converting your foreign Driving License to UK Driving License. https://www.gov.uk/exchange-a-foreign-driving-licence
In the United Kingdom, a driving licence is the official document which authorises its holder to operate motor vehicles on highways and other public roads. It is administered in England, Scotland and Wales by the Driver and Vehicle Licensing Agency (DVLA) and in Northern Ireland by the Driver & Vehicle Agency (DVA). A driving licence is required in England, Scotland, and Wales for any person driving a vehicle on any highway or other “road”, as defined in s.192 Road Traffic Act 1988, irrespective of the ownership of the land over which the road passes. Similar requirements apply in Northern Ireland under the Road Traffic (Northern Ireland) Order 1981. As long as Great Britain and Northern Ireland remains within the European Union, a UK driving licence is a European driving licence.
As UK nationals do not normally have identity cards, a photographic driving licence can serve many of the purposes of an identity card in non-driving contexts, such as proof of identity (e.g. when opening a bank account) or of age (e.g. when buying age-restricted goods such as alcohol or tobacco).