Cardboard boxes & large sheets of cardboard

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Having recently moved, I have a lot of cardboard boxes currently sitting in my shed. Various sizes, I don't think any have actually come from a removals/storage company - mostly it's ones I picked up from supermarkets and some furniture boxes. They're currently made up, but can be flattened if that's easier for you. Saves you the job of trying to hit the supermarkets when they're restocking the shelves. I also have some very large but very shallow cardboard boxes and sheets of card that I wonder if anyone can make use of - perhaps a teacher or youth group for some kind of craft activity? Currently in the garden so will be wrecked if the predicted rain comes. Collection for these ASAP as they're getting in the way and will have to go to the dump. Collection near Tesco in Brandon, Suffolk.