Britons could be given fortnight's notice of potential 'green list' changes Emma Featherstone, Hugh Morris Holidaymakers could be given two weeks’ notice if a country is at risk of being removed from the quarantine-free travel “green list”, Transport Secretary Grant Shapps said today. Mr Shapps said the Government “would flag perhaps a couple of weeks in advance” if a country could change category under the “traffic light” system for the resumption of overseas travel. The Transport Secretary, who made the comments while speaking to MPs, also confirmed there would be no relaxation of the requirement to secure a negative PCR test before arriving in the UK, but that the rule would be reviewed in late June.