Tea supplier Only Natural Products is investing £1m in new factory equipment to keep up with booming export demand.

The maker of Higher Living tea - which is sold at Asda, Tesco and Waitrose - has recently secured listings in Scandinavia and Australia. As a result, it has grown exports 48% this year and is expecting growth of 125% in 2014.

More than half its sales - which are forecast to top £12m next year - are now from exports.