One thing visitors to the GDS office can't help noticing is the colourful selection of cartoons and doodles stuck on the walls.
Many of them are the work of GDS technical architect Paul Downey. His witty drawings do more than just brighten up the office and put smiles on people's faces - they also act as useful reminders about the principles that guide our work.
Many's the time one of us has used one of Paul's drawings in a presentation, because they say such a lot with just a few pen strokes.
We thought it would be nice to get Paul in front of a camera and ask him where the ideas come from, and how the doodling began.
(This film is an experiment, the first one we've made about an individual, rather than about a team or a service. As always, feedback is welcome.)