Because of Boris Johnson's extreme tory brexit
removing our freedom of movement rights, a number of British immigrants living in the EU are coming to the end of their 90 days allowed stay and are in the process of being deported. A disproportionate number seem to be brexit supporters who didn't think they needed to do anything in order to be allowed to stay. They were not correct.
Article (wash your eyes afterwards): www.express.co.uk/news/politics/1415577/Brexit-news-latest-eu-vaccine-block-astrazeneca-uk-john-redwood-boris-johnson