When I was a kid the highlight of my week would be doing a fossil hunt at the local quarry... that kind of thing.

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.

We actually did go on a camping trip together as part of the research, in a caravan, for a week. I guess we picked who annoyed us most from genuine experience. We did a lot of research on camping and what annoys people. It's quite often children playing ball games. It's a huge debate in the caravan world whether children should be allowed to play ball games or not.

Growing up, I didn't feel very cool having come from the Midlands.

Both of us have forged our careers in London, but a lot of my comedy influences come from my family and my childhood.

I always think it's just best to just make stuff and to carry on making stuff, even if it's not off your own back, because that's the only way... especially as a comedy writer, I make short films and then show them to live audience, so if they're laughing you know you're doing something right.

I think 99% of the whole thing is to have passion about the idea yourself. I think part of your job as a filmmaker is to tell someone that might not think it's going to work that, actually, it will work.