The film [Sightseers] is really the story of the journey of a relationship, so the killings are almost a metaphor for the trials they go through. We wanted people to identify with the experience of going on holiday and having a quarrel with your wife, boyfriend, whatever. We knew if we didn't crack that it would not be watchable as a film.
For me, writing stories set, well, wherever they're best set, is a form of cultural curiosity that is uniquely Scottish - we're famous for travelling in search of adventure.