I like a building with a good atrium – a large and well-lit indoor space – and the Weston Library in Oxford is one of those places locally.

I popped in there on a lunchtime stroll last week and sketched this. I do most of my work in this sketchbook in pen but, since I had recently got round to sharpening the pencil I keep in my little art kit, I decided to use that for this drawing.