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.

We developed 'Sightseers' as a TV idea but didn't get anywhere with it because all the channels said it was too dark originally as an idea for television.

It's nice to think people might be talking about it after they've seen it. With some comedies it's a bit 'wham bam thank you ma'am', and then you just go for a pizza.

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

I think what's difficult is proving to people that a script actually does work and sometimes the laughter might not be on the page, it might be between the lines.

We always wanted to make a comedy that was a little bit more than that, which had tragic elements to it... that people engaged with - an intelligent comedy essentially.

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.