Upvote:12
As a UK citizen, only a passport is sufficient as a travel document, as the UK does not have ID cards.
Specifically, driving licences do not establish nationality.
If you are an EU national, you do not need to show your national ID card or passport when you are travelling from one border-free Schengen EU country to another.
[...]
Driving licences, post, bank or tax cards are not accepted as valid travel documents or proof of identity.
[...]
When travelling to or from a non-Schengen country you must show a valid ID or passport. Before travelling, check what documents you must have to travel outside your home country and to enter the non-Schengen country you plan to visit.