A couple of relatives are due to fly back to the U.K. from Italy and are now at the stage of booking the antigen test (rapid swab) for return to the U.K.
The U.K. gov website says 72 hrs before is fine, but the Italian providers they consulted said their rapid antigen tests are valid for a maximum of 48 hours. Is it just a case if discrepancy between countries’ validities (for eg the vax certificate here is valid 9 months, the U.K. one is 12 months) or do they risk being turned away at the airport?
For logistical reasons it would be easier to get the test done 3 days before and not 2.
Any advice?