“British tourists are being advised by the government to leave Tunisia immediately amid fears of a further terrorist attack and concerns that the local authorities are unable to provide adequate protection, the Foreign Office has said.”
“Tour operators are organising extra flights to bring tourists back to Britain after the Foreign Office amended its travel advice to warn against all but essential travel to the country.” (Coordination Center)

http://www.theguardian.com/world/2015/jul/09/foreign-office-warns-against-travel-to-tunisia-in-wake-of-attack