Wickes "timberboard" available in a range of widths. Delivered pretty quickly and is not bad quality. For pine. For reference, there's about £170 of timber in that.
Is that the stuff that is made out of smaller battens to avoid cupping? I built some shelves with it a couple of years ago and really liked it. Expensive now though.
Thanks. I have been asked/told to make something similar for shoes and rucksacks. Doubt I'll get it done in half a day though.