Someone not looking at the page right. :-)
http://www.diy.com/diy/jsp/miscellan...y/delivery.jsp

It appears this refers to goods ordered "online"

i.e

Available in-store only Product is only available from your local B&Q
store. Ranges may vary so please check before travelling.



You can return unwanted goods to any B&Q store. Please take the Sales
Invoice received with your order and let the in-store customer service staff
know that you ordered the goods from www.diy.com and they will process your
refund immediately.