One basket
A Packaging Boxes order can hold the carton, the void fill and the tape. Placed by 3pm, they leave together. The tape is not saved for a later van.
Free UK delivery uses the combined goods total, over £50 ex VAT. Three separate checkouts can each miss that line.
Jobs
The board is the wall. Fill stops the goods moving. Bubble or foam covers a face. Tape closes the lid. A book wrap does not need a deep carton as well.