His first book, This is Going to Hurt, revisiting his former career as a junior doctor, spent over a year at number one in the Sunday Times bestseller list. The bestselling non-fiction title of the decade and the bestselling non-fiction e-book of all time, it has sold over two million copies.

His second book, Twas the Nightshift Before Christmas, was published in October 2019.

As a writer, script consultant and script editor his credits include Mitchell & Webb, Very British Problems, Mrs Brown's Boys, Crims, Mongrels, Up The Women, Flat TV, Our Ex Wife, Bounty Hunters, Blind Date and Child Genius. He has appeared on many panel shows and written jokes for a number of high-profile comedians.

He is also a regular contributor to The Sunday Times.