The Chartered Trading Standards Institute (CTSI) said fraudsters were using bogus social media adverts and exploiting passport renewal delays to target unsuspecting holidaymakers, with many keen to get away during what is set to be the first summer unaffected by Covid since 2019.

According to the CTSI, the methods used by scammers are becoming "increasingly sophisticated", capable of tricking people into shelling out for deals "that are literally too good to be true".

"They employ a variety of tactics to trick their victims into handing over money and personal information, including bogus emails, texts and phone calls, as well as social media listings and online adverts," said the CTSI.

The institute said social media listings and online ads were a particular danger, with the scammers using high quality imagery and attractive pricing to "snare people in search of a bargain". It warned that once duped, most victims were not only left without their dream holiday, but without means to get their money back.

Key warning signs, said the CTSI, include being asked to pay in cash, via bank transfer or through an intermediary, making transactions harder to trace.

In addition, the CTSI warned scanners were taking advantage of potential disruption arising from industrial action by UK Passport Office workers, "offering bogus ‘fast track’ services to help holidaymakers beat delays".

"There have recently been a number of texts and emails offering speedy passport renewals," said the institute. "As well as taking victims’ money, scammers can then use the personal data they harvest to commit identity theft."

Katherine Hart, CTSI lead officer, said as with any research, consumers should do their research and "only shop with reputable companies".

John Herriman, CTSI chief executive, added scammers were quick to leap on any opportunity "to take advantage of uncertainty and upheaval", highlighting in particular the likely impact of the Passport Office strikes as an example of criminals "preying on people’s vulnerability".