The Foreign Office has warned that demonstrations are expected in Tunisia on and around December 14.
In its travel advice it said: "Tunisia is going through a tense political transition following the 2011 revolution.
"14 December will be a key date for the transitional process. It is likely that demonstrations will be called on or around this date and there may be clashes between rival groups, or between protestors and the police.
"Demonstrations are also likely to be held around the country to mark December 17 and January 14, which are anniversaries of important events during the revolution."
It added that although protests are not normally aimed against foreigners, international events can trigger anti-western demonstrations.
