The company has cancelled all trips up to and including May 14, while its Marella Cruises sailings have been axed until at least June.

A spokeswoman said: "We are constantly monitoring the situation and will start taking people on holiday again as soon as we are able to do so.

"At this point in time, nobody can accurately predict when that will be, so for the time being we will keep a close eye on our programme and continue to amend and adapt timings in line with the latest global travel advice."

She added that customers with a cancelled booking "will be able to amend their holiday to any other Tui package holiday on sale" via its website.

The firm did not say that consumers would be entitled to a refund.

Under EU law, travel companies must offer to refund customers within 14 days if their package holiday is cancelled.

But the industry has warned that many firms will be unable to survive if they are forced to pay out immediately.

Trade association Abta has called for the UK Government to follow measures taken in other European countries to allow holiday companies to issue credit notes instead of cash refunds due to the deluge of claims caused by the coronavirus pandemic.

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UK's biggest travel firm Tui suspends all beach holidays for next five weeks