The figure for 2012/13, contained in the retailer’s annual Net Positive report, encompasses solid wood, panel products, paper and other wood-derived products.

B&Q and Screwfix maintained their 100% responsible sourcing rate, while other group companies made significant progress – Brico Dépôt Spain achieving a 98% rate across its highest volume lines and Brico Dépôt France reaching 87% across all timber and paper products.

Brico Dépôt France has been working closely with The Forest Trust to bring responsibly sourced products to market.

Kingfisher said traceability was particularly challenging for panel products.

"To help address this issue, we are reducing the overall number of board manufacturers we source from in the Asia-Pacific region and we are working with them to reduce the number of suppliers in their supply chains," Kingfisher said.

The company has set a 2020 target for all group products containing tropical hardwood to be FSC-certified or endorsed by schemes working towards FSC certification.

The UK and French operations achieved this in 2012/13 for all new stock purchased, while other group companies have chosen to eliminate certain species, such as merbau in Castorama Poland and B&Q China.

Kingfisher is forecasting timber product price rises of up to 75% by 2020, while the global timber shortfall could possibly reach 30% by the same year.