LKS 20230304 Police officers monitor pro-refugee supporters in Dover on the south-east coast of England, on March 4, 2023, as pro-and anti-migrant demonstrations take place in the town. - More than 45,000 migrants crossed the Channel to the UK from mainland Europe in 2022, surpassing the previous year's record by more than 17,000. LEHTIKUVA / AFP, AFP / LEHTIKUVA / SUSANNAH IRELAND