Holidaymakers with trips booked to Malta have seen their plans thrown into chaos as the country is not accepting the NHS app as proof of vaccination. From Wednesday, travellers from the UK aged 12 and above are only permitted to enter Malta if they have had both doses of a coronavirus vaccine. But authorities in the central Mediterranean archipelago revealed on Monday that they will only accept printed letters sent by the NHS as proof. That means tourists planning to use the NHS app to demonstrate their status face being turned away at UK airports or the border in Malta, even if they are fully vaccinated. The UK Government’s website states that letters are expected to take “up to five working days” to be delivered. Several affected people have sent Twitter messages to the British High Commission for Malta stating that the policy means their trips cannot go ahead as …