In the context of this article, the main reason is Brexit. In fact UK, government was helping a lot with Covid situation including paying to furloughed employee

In the context of this article, the main reason is Brexit. In fact UK, government was helping a lot with Covid situation including paying to furloughed employees. UK no longer can attract workers from EU. Eastern Europeans are moving back because after the Brexit vote they no longer feel welcomed and theirs home countries improved a lot in last 10 years. UK created perfect storm in last 10 years: 1. Add tuition fees for higher education. 2. Build negative perception on immigration. 3. Reduce council housing, keep house prices artificially high. 4. Vote Brexit and fail in process, destroying currency value. 5. Fail to provide opportunities for upward mobility for most immigrants.