I’ve been painting on watercolour paper (W&N) on my plein air travels but I have recently returned to using my sketchbook. I bought a small square sketchbook for black & white studies, exactly like the one I used in London five years ago and have drawn a couple of sketches in between paint outs.
Also I have returned to a larger format sketchbook which has been unused for a couple of years and like the informality it offers.

Thames at Shepperton

Barn at Cranleigh

Hay Stacks at Ripley

Royal Festival Hall

Buckingham Palace