Turkish authorities blamed Kurdish separatists for the attack in which 80 people were also injured.
The British Government’s update followed a similar warning from the US Embassy which advised travellers to “stay alert”.
It said: “The US Government cautions its citizens of possible imminent retaliatory attacks by terrorists against churches, synagogues, and diplomatic missions in Istanbul or other places Westerners frequent, especially in the Beyoglu, Galata, Taksim or Istiklal areas.”
The US Embassy advised travellers to avoid crowds, keep a low profile and be aware of their surroundings.
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source: express.co.uk