Paul the Wolf
Former Score Predictions Comp Organiser (now out)
She's dutch and uses a passport which she also needed for both her covid tests. It's also a requirement in the hospital, when you take other id, like i did in the summer, they make a note "passport not provided, residence permit shown" so yeah, id cards are ok but dont carry any global clout. if you want to holiday only in europe fine, i've seen 1 person use id card to travel and that was a work trip in the shengen zone.
Right OK, as I said as you're British you've always needed a passport when travelling to another country. As she's Dutch she only needs an ID to stay within the EU/Schengen zone. Of course if you travel outside the EU/Schengen zone then she'd need a passport but EU citizens didn't need one to travel to the UK previously .