France's citizenship minister Marlene Schiappa criticised "smugglers who take advantage of the distress of human beings".
The system has been in place since at least 2015 and used traffic light colours to grade every entry visa application to the UK, assigning Red, Amber or Green risk rating to applicants, according to one NGO.
Eritrean migrants on a flight last year told Euronews that they were forced to fly back to Asmara even after they changed their minds. The UN says Eritrea is one of the most repressive countries on earth - so why is the EU paying for migrants to return there?
He has vowed to put a 60-day stop on the issuing of green cards in an effort to limit competition for jobs in an economy wrecked by the coronavirus.
Migrants clashed with Greek police after Turkey officially declared its western borders open to those hoping to head into the European Union.
Police could be seen patrolling the Greek border in Kastanies as dozens of migrants lined its fence.
Europe has not felt the full impact of Brexit yet. But one corner of rural Germany is feeling its effects already.