Vectis Birder
Itchy feet
I use A4 Daler-Rowner sketchbooks too, the black hardcover ones. They're excellent and although they're a bit pricier than cheapo pads from Tesco, I have no worries about making a mess of them - that's what sketchbooks are for! A5's too small, A3's a bit big for me (going against the flow here).