The £20 per person tests will be provided in partnership with government-approved firm Chronomics. The price includes delivery and return costs of the postal tests.

Tui is subsidising the cost when bought alongside its package holidays. Tui customers will be able to purchase the tests from Monday 10 May via their online customer account.

Brits visiting green list countries won’t have to self-isolate on return to the UK. However, they will need a pre-departure test when arriving back in the UK and a PCR test on day two after getting home. Bought direct from testing companies, polymerase chain reaction (PCR) tests cost up to £120.

As well as the inbound testing packages required by UK regulations, Tui customers can also select kits that include an additional outbound PCR test should that be a requirement of the destination they are travelling to.

Four testing packages

Tui has agreed four testing packages with Chronomics. The £20 tests contain one pre-departure lateral flow test and one inbound PCR test for day two.

A £60 package is available, which includes one outbound PCR test with courier costs, one pre-departure lateral flow test, and one inbound PCR test for day two.

People who’ve visited ‘amber’ countries would need to pay for two PCR tests to be allowed back into the UK. Tui is offering a £50 package for these travellers, containing one pre-departure lateral flow test and two inbound PCR tests, for days two and eight.

A £90 option is also available, with one outbound PCR test with courier costs, one pre-departure lateral flow test and two inbound PCR tests for days two and eight.

Pre-departure lateral flow tests will include test verification and certification to fly back to the UK.

Andrew Flintham, managing director of Tui UK & Ireland, said: “We have always believed that cost-effective testing solutions, as well as maximum flexibility, will make travel a possibility this summer and beyond.

“Our research has shown that customers are looking forward to their much-needed holiday overseas, but affordable and easy testing solutions was imperative to make this a reality.

“The four new exclusive testing packages have been developed with our customers in mind; they’re offered at greatly reduced prices, include certification to travel and will be a simple process from start to finish.

“Also, should testing requirements change between purchase and travel, for example if an amber package is purchased and the destination moves onto the green list, we’ll simply refund the difference.”

The green list of countries deemed most safe to travel to is due to be announced tomorrow, with travel restrictions changing on 17 May. Green list destinations are expected to include Portugal, Malta, Gibraltar, Iceland and Israel.

Which? travel editor Rory Boland Tweeted: “TUI’s £20 test package for green countries is great news – but you have to be a TUI customer. Only larger holiday companies can subsidise test costs. It’s unfair on medium and small business, and consumers whose choice is reduced. Gov needs to reduce costs across the board.”