At the age of 25, he became the youngest writer to ever work on the UK series Coronation Street.
He suffers from Bipolar Disorder (Manic Depression).
His favourite song (as selected on the BBC radio show Desert Island Discs) is 'Good Vibrations' by the Beach Boys.
In 2005, he was the first TV writer to be presented with a South Bank Award for outstanding contribution to the arts.
Paul won a BAFTA in 2004, for his writing on 'Shameless'.
Paul: (speaking about his series Linda Green) The whole point of writing Linda Green was that it was an anti-Ally McBeal and anti-Sex in the City.
Paul: Within 15 seconds of watching Coronation Street today, I can tell who wrote it and I often turn off because I'll go, 'Oh it's her',or 'Can't stand him'.
Paul: What you can and can't say on TV in America is really dangerously constrained by the FCC - That's Nazism!
I've never seen anything so brutal in all my life.
Paul: (speaking about his show Shameless) The stories I tell in Shameless are accurate to what I know. I can point to the source of every single story.