I have found a similar question posted here but without clear answers.
So this is my issue too. It is clear that after October 1st 2021 if one wants to travel to United Kingdom as an EU citizen you need a valid passport, it's not permitted anymore with the national ID.
My plan is to visit Gibraltar this month entering on ground from Spain. Gibraltar is part of UK but still has some different regulations. If I understand right it is part of the Schengen area in a way that UK never was, so maybe there are different rules for crossing the border too.
To sum up, my question is do I need a passport to enter Gibraltar as EU citizen coming from Spain, or is it still acceptable to enter with my national ID?