There are actually a fair number still around. Following Brexit, HMG launched a scheme inviting EU citizens in the UK to apply for residency. They expected three million applicants but the final number who did apply was well over six million. They're not all from Eastern Europe, of course - they hail from across the EU27 as a whole. But they have 'grandfathered' the right to live and work here and many do. And presumably those who chose to return to other countries for the duration of the pandemic retain the right to return to the UK when they want to. All good news as far as I am concerned, and you still hear Eastern European accents amongst workers at MAN.