Dysfunctional co-dependent relationships always appeal to me. I don't know exactly how it started. I start writing sketches of characters and little scene-lets, and then it builds.
I acted at school but got very bad parts - things that they'd made up in Shakespeare plays like 'Guard 17' - so I wrote plays and gave myself parts, then I wrote sketches, then I did stand-up. Even in the school nativity I was the emu in the manger.
I started writing sketches with Dennis Kelly, who I ended up writing 'Pulling' with. We entered a BBC competition and did quite well, then started writing bits for other people's shows. You wheedle your way in, write pilots and eventually you end up writing a sitcom.