Britons in Kuwait remain under threat

There remains "a high threat to British individuals and organisations in the region", it says.

"The risk of further terrorist attacks within Israel and the occupied territories, including in Jerusalem, often targeting crowded public areas and transport, remains very high."

And terrorists could use chemical and biological materials, it says.

Maintain a very high level of vigilance Foreign Office

"Developments in Iraq and on the Middle East peace process continue to have an impact on public opinion in the region.

"This might be expressed by some people, including through acts of violence against British nationals or organisations."

Britons are advised to "maintain a very high level of vigilance" particularly in public places frequented by foreigners including hotels, restaurants and shopping malls, "follow news reports and keep in touch with regional developments", avoid political gatherings and demonstrations and take "sensible security precautions" for their personal safety.

Officials advise against all travel to Yemen, the city of Ma'an, southern Jordan, the West Bank and Gaza, and all non-essential travel to Lebanon.