BRITISH holidaymakers travelling anywhere in the world have been told to be vigilant as they are at risk of being attacked by Islamist terrorists.

The Foreign Office issued a worldwide travel warning, saying tourists were at a risk of attack as a result of Britain’s intervention in Iraq and Syria, the Daily Telegraph has reported.

It warns tourists to Turkey to avoid any travel to within 10 km of the Syrian border, and all but essential travel to the southern provinces. There is a risk of “indiscriminate” attacks in places visited by tourists in the rest of the country.

The warning applies to every country in the world, and the FCO updated travel guidance on its website. It reflects a “generalised threat” to Britons, rather than intelligence of a specific and credible attack.

The warning states: “There is considered to be a heightened threat of terrorist attack globally against UK interests and British nationals from groups or individuals motivated by the conflict in Iraq and Syria. You should be vigilant at this time.”

Up to 500 Britons are thought to have travelled to the Middle East to fight, and there have been a spate of arrests in recent weeks related to suspected terrorism offences.