The trailer for the film version of BBC3 sitcom Bad Education has just been released. In it we get a taste of the antics that Alfie Wickers and his class get up to in Cornwall on the school trip to end all school trips. Incidents include Wickers – played by Jack Whitehall – tea-bagging a swan and whizzing down a zip-wire with his trousers around his ankles. It looks pretty gross but also pretty funny. The film is released on August 21.