Arora Group has partnered with UK-based biotech firm Halo for the project, with packages at Heathrow’s Sofitel hotel, which adjoins Terminal 5, starting from £179.

Guests who book a test and rest package will be provided a self-testing kit, which simply involved spitting in a tube, packaging it up, and returning it.

Their sample is then tested, with a result and certificate provided via an app. It means that so long as they test comes back negative, test and rest passengers will be set to travel in the morning.

Surinder Arora, founder and chief executive of Arora Group, said: "The ability to stay in a hotel the night before a flight and get a recognised PCR saliva-based Covid-19 test and result before the flight the following say just made sense."

Dr Nigel Kellow, Halo chief medical officer, added the system offered travellers a "secure and simple" way to "travel and enjoy life again in confidence".