Cardboard boxes (Whitchurch CF14)

All sizes, mostly not flattened, good quality.
Take as many as you like, collection only.

*Update* Mostly smaller boxes left (up to about 40cm wide), good for carrying heavy things (e.g. books), storing small stuff (e.g. crafting supplies), or packing delicate things (e.g. ornaments). There are a few medium & large still available, but all either unusual shapes or more warn out than the others.