The Foreign Office has issued an urgent warning to holidaymakers travelling to Turkey.
Travellers heading to Turkey over the summer have been warned to expect disruption due to unscheduled presidential and parliamentary elections later this month.
In a statement issued on 1 June, a government spokesperson said: "Presidential and parliamentary elections will take place on 24 June 2018.
"This may result in rallies and demonstrations around the country. You should avoid large gatherings and follow the advice of the local authorities."
This warning is in addition to an existing warning against all travel to within 10km of the border of Syria and to the city of Diyarbakir.
Terrorists are very likely to try to carry out attacks in Turkey, say the Foreign Office.
"Terrorist groups, including Kurdish groups, Daesh (formerly referred to as ISIL) and far left organisations, continue to plan and carry out attacks. Further attacks could be indiscriminate.
"Most terrorist attacks have taken place in the south and east of the country and in Ankara and Istanbul. Attacks are most likely to target the Turkish state, civilians and demonstrations. Nevertheless, it’s likely that some attacks will also target western interests and tourists from western countries, particularly in the major cities."
Additional security measures will also be in place on flights going from the UK to Turkey.