Holidays: “I think people thinking about holidays this summer are barking up the wrong tree" (Image: Getty Images) "If you do not comply (and you do not have a valid exemption) your airline or carrier may refuse you boarding and/or you may be fined on arrival. "All other current entry requirements and restrictions continue to apply." The FCDO went on: "From 4am on January 18, you must also self-isolate when you enter the UK from any foreign country except Ireland, unless you have a valid exemption. "All other entry requirements and restrictions continue to apply. Read the guidance on self-isolation for England, Scotland, Wales and Northern Ireland."