A video advising UK holidaymakers what to do in the event of a terror attack abroad has been released by police. The four-minute film depicts a firearms attack unfolding at a hotel and uses the "run, hide, tell" safety message. Thirty British tourists were among 38 people killed when a gunman attacked a Tunisian beach resort in June 2015. Counter terrorism police said there is no specific intelligence Britons will be targeted this summer and the film is part of a general awareness campaign. But Det Ch Supt Scott Wilson told the BBC it was "only right" to offer advice following the terror attacks in London and in Sousse, Tunisia. "These people are not there to steal a mobile phone or steal your watch, they are there to kill you, you have to get yourself out of that danger zone," Mr Wilson told…