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B&Q 15% off everything in store
Register 'n' print voucher

Get 15% off all full-priced items, with the exception of installations and gift cards, in-store at B&Q with this printable voucher. The voucher is only valid from Thurs 20 August to Tues 25 August in-store, so can't be used at diy.com or nextday.diy.com. Unfortunately the voucher's not valid on sale items.

There's no minimum spend to get the 15% off but the voucher cannot be used with other discounts like the trade card.

http://www.moneysavingexpert.com/deals/discount-voucher-codes

Just enter your name and any old email address (you know, the one you keep for registering on dodgy web sites) and print off a voucher with your name on it.