As from 1st January travellers will no longer be able to take 2 or bring back from certain foodstuffs from mainland Europe.
Lorry drivers will be particularly badly affected. Many are self contained in their cabs but will not be allowed to carry cheese, dairy or meat products from the UK to Europe. What alters on the 1st Jan to make foodstuffs unsafe is nowt, other than Europe being childish about us leaving !?!?!
It has long been illegal to transport food etc. from African counties and non-Europe countries ....... supposedly to stop F&Mouth and anthrax in particular.
I can't see the above being a problem for us until about Easter but worth looking at your plans for transporting food especially those that have properties in France and Spain. There will be changes in the Green Card system too.