1. 1 Countryside and Community Research Institute , University of Gloucestershire , Cheltenham , UK
2. 2 Division of Food Production and Society, Norwegian Institute of Bioeconomy Research , Bergen , Norway
3. 3 Division of Food Production and Society, Norwegian Institute of Bioeconomy Research , Tromsø , Norway
4. 4 Countryside and Community Research Institute , University of Gloucestershire , Cheltenham , UK