The Foreign Office says anyone heading to Tunisia should be aware that further attacks are possible, and they need to be vigilant.
If you are in the area already it advises keeping in touch with your tour operator and following any advice from Tunisian security authorities.
It says a reinforced British Embassy team is on the spot near Sousse providing consular assistance to British nationals in the wake of the massacre.
The Foreign and Commonwealth Office (FCO) advise against all travel to:
the Chaambi Mountain National Park areathe Tunisia-Algeria border crossing points at Ghardimaou, Hazoua and Sakiet Sidi Youssefthe militarized zone south of, but not including, the towns of El Borma and Dhehibawithin 5km of the Libya border area from north of Dhehiba up to but not including the Ras Ajdir border crossing
The FCO advise against all but essential travel to: areas south of, and including, the towns of Nefta, Douz, Médenine, Zarzis (including the Tunisia-Libya border crossing point at Ras Ajdir)within 30km of the border with Algeria south of, and including, the town of Jendouba (this area includes the archaeological sites of Bulla Regia and Chemtou)the governorate of Kasserine, including the town of SbeitlaIf you travel to the interior of Tunisia, you should do so with a reputable tour guide.
FCO points out that 424,707 British nationals visited Tunisia in 2014. It says most British tourists stay in the coastal resorts and most visits are trouble free.