The advice warns: "Lavish hospitality, flattery and the 'red carpet' treatment are used by some intelligence services to soften up a target for recruitment who may then feel obliged to co-operate rather than offend the hosts."
MI5 also urges sunseekers to be careful about holiday romances, as having sex with a stranger could make them vulnerable to blackmail. Tourists might also think twice about discussing national security within earshot of hotel staff or taxi drivers who in some countries are required to report to the local security service.
Holidaymakers are even being told to be alert on their return to Britain. MI5 has compiled a list of warning signals that could indicate a foreign intelligence service is "cultivating" them. They should consider contacting the police or their company's security co-ordinator if they come across people who prefer to meet face-to-face, want to become friends, or ask personal questions.
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