If you can make someone believe that you believe in the idea then I think that's worth a lot.

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

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.

If you can make someone believe that you believe in the idea then I think that's worth a lot.

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.

Ironically, there isn't much comedy film in Britain, which is quite surprising seeing that we're quite good at it.

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.