It applies to MSC Virtuosa’s sailings around the British Isles and P&O’s UK coastal voyages onboard Britannia and Iona departing between 8 July and 24 September.
MSC do not require fully-vaccinated travellers to take a Covid test, while all P&O guests - including those with both jabs - will need to provide evidence of a negative PCR test.
On Tuesday (29 June), MSC announced an amendment to its policy, requiring adult guests to be fully vaccinated owing to what it described as a "change in government policy" to allow higher passenger capacity.
