The lines that belong together
Order double wall for those goods and single wall for the rest.
Double wall still needs tape, and fill if the size is loose. The board does not fill the gap.
The line that stays separate
a larger single wall box stays on its own order line. A larger single wall carton adds air and still has the lighter board.
Double wall boxes is the range Packaging Boxes uses for double wall boxes.
One basket
The range is also the removal board. It is listed apart from single wall.
TradePro at Packaging Boxes, for trade businesses, starts at 5% off and goes up to 10% when you spend over £1,000 a month, and it adds BACS. It does not change which Double wall boxes you needed.
Open Double wall boxes when you already know this line. The bundle quantity is on the page. Packaging Boxes will still dispatch an order placed by 3pm on the same day.