Turkey’s tourism industry is only just beginning to recover after a spate of deadly terror attacks saw tourists abandoning the Eastern European hotspot for other resorts.
In 2017, 39 people lost their lives after a gunman went on a rampage at a upmarket Istanbul nightclub.
Over the last few months, the country has been viewed as being safer to visit, according to the Foreign and Commonwealth Office (FCO).
But the the government body has issued new guidelines advising the climate has yet again changed.
Turkey travel advice: What is Foreign Office warning on terror attacks?
The FCO says “terrorists are very likely to try to carry out attacks in Turkey” and “it’s likely that some attacks will also target western interests and tourists from western countries, particularly in the major cities”.
Travellers are advised to “remain vigilant” in crowded places and popular areas with tourists.
The FCO advises against all but essential travel to the remaining areas of Sirnak, Mardin, Sanliurfa, Gaziantep, Diyarbakir, Kilis and Hatay provinces, plus the areas of Siirt, Tunceli and Hakkari.
Visitors are strictly warned not to travel to within 10km of the border with Syria and to the city of Diyarbakir in southeastern Turkey.
Political unrest caused by presidential and parliamentary elections on June 24, 2018, could also cause disruption to people’s holidays.
Following a political coup on July 15 to 16 2016, the security environment remains “political volatile” and a state of emergency is still in place.
The FCO said Turkish authorities “have successfully disrupted attack planning in the recent past” and tightened security after previous incidents.
But visitors are advised to keep up to date with travel advice and to be aware of additional checks in Turkey.
The FCO statement said: “In some busy areas, especially Istanbul, the Turkish authorities are stopping members of the public to conduct ID checks.
“There’s also a larger than usual number of police checkpoints on main roads across Turkey.
“You should co-operate with officials conducting checks, and keep your passport and a printed copy of your e-visa or your residence permit with you at all times.”
More than 1.7 million visits are made to Turkey by British tourists every year, the majority of whom experience no problems whatsoever.
Many hotels and booking services have been offering cheaper deals in recent months in order to encourage holidaymakers back to the once popular tourist hotspot.
In April, Thomas Cook said its package holidays to Turkey were up by 84 per cent.
People in need of emergency assistance from the UK government while in Turkey, are advised to contact their nearest British embassy, high commission or consulate.