Angus Soft Fruits is to expand its Good Natured Fruit brand to include blackberries and blueberries next season.

Currently, the company only markets strawberries and raspberries under the pesticide residue-free brand, listed in Sainsbury's, Asda and The Co-operative, and developed in response to growing concern over pesticides.

Angus Soft Fruits has received approaches from companies abroad interested in the concept.