Boris Johnson has advised people to follow the government's traffic light system on travel if they are planning a holiday abroad this summer.
The Prime Minister told holidaymaker s to follow the "red, amber and green" travel advice after he was questioned about ministers' "contradictory" statements.
During a Downing Street press conference, the Prime Minister was asked what advice he recommended travellers to follow after earlier comments by Transport Secretary Grant Shapps and Environment Secretary George Eustice.
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Mr Johnson said: "On travel abroad, I think that the most important thing is just to follow the red, amber, green guidance that we're giving.
"That's continually reviewed. I wouldn't want to give any more guidance than that at this stage."
Mr Johnson's comments come as a travel expert warned that quarantine-free travel from the UK to mainland Europe will not be allowed before the end of July.
Paul Charles, chief executive of travel consultancy The PC Agency said it was his “clear understanding” that ministers “do not intend to open up travel to mainland Europe or the USA before the end of July”.
Mr Charles said that Portugal and other countries such as Malta, Morocco, and Grenada should be on the green list but decisions being made on restrictions were “highly political, not based on data at all."
Those arriving in the UK from a green country are not required to self-isolate, whereas amber arrivals must quarantine at home for 10 days.
There were hopes that destinations such as Spain, France, Italy, and the US would be added to the green list ahead of the peak summer holiday season.
But, Mr Charles said: “Ministers have fallen into line to protect their future careers and potentially benefit from an upcoming Cabinet reshuffle. And that means sacrificing the early opening of the overseas travel sector.
“Now thousands of jobs are at risk – as are some airlines and travel firms – because June and July will be lost in travel terms.”
Mr Charles said key figures in government were “in favour of opening up travel sooner”, but were “overruled” by Health Secretary Matt Hancock, Home Secretary Priti Patel and Cabinet Office minister Michael Gove.
He added: “Buoyed by opinion polling, they have now all united to focus on reopening the UK by mid-July, once the vaccine roll-out has reached 18-year-olds and above, and eradicating the Delta variant which originated in India.
“Once the UK has opened up almost completely, then overseas travel will be back on the agenda for the end of July.”
The Department for Transport is reviewing the travel lists every three weeks, which suggests the next changes will be announced on Thursday, June 24.
