These are all the places on the UK Foreign Office's 'do not travel' list

"Large parts of the Middle East, including Iran and Israel, currently feature on the list, and parts of the United Arab Emirates. Those choosing to ignore this advice risk inundating travel insurance and may struggle to access help from home if needed in certain locations."

"At the time of writing, the Foreign Office flags 76 countries or territories as 'do not travel' due to security, health or legal reasons (out of 226 countries total)."

The UK Foreign Office has expanded its 'do not travel' advisory list in response to ongoing Iran-US tensions. Large portions of the Middle East, including Iran and Israel, along with parts of the United Arab Emirates, now feature on this list. The Foreign Office currently flags 76 countries or territories out of 226 total as unsafe for travel due to security, health, or legal concerns. Travelers who ignore these warnings risk invalidating their travel insurance and may face difficulties obtaining assistance from the UK government if complications arise. Some countries experiencing disruption and conflict, such as Egypt, Cyprus, and Turkey, remain classified as safe for travel according to Foreign Office guidance.

Read at CN Traveller