You mean this https://www.gov.uk/government/news/fco-statement-on-poland-travel-advice https://www.gov.uk/government/news/fco-statement-on-poland-t... ? Slovak

You mean this https://www.gov.uk/government/news/fco-statement-on-poland-travel-advice https://www.gov.uk/government/news/fco-statement-on-poland-t... ? Slovakia had a similar traffic stop. People had to cross the border crossings on foot - and international trade was exempt from this. Also, when they crossed, they were loaded on buses and sent to mandatory 14 day quarantine to state facilities. AFAIK only Belarus forbids repatriation, and it has more to do with the demonstrations against the regime than COVID.