Yorkshire Tea has gained ethical accreditation from the Rainforest Alliance and has begun a campaign to save an area of forest the size of its home county.

The Rainforest Alliance logo will be appear on pack from later this month.

"Building direct, longstanding relationships with suppliers and paying top prices for top-quality teas has long been part of our buying policy," said a spokeswoman.

The Harrogate business has pledged to save one tree in Peru's Amazon rainforest for every box of Yorkshire Tea sold.