In their final video trailer prior to the release of the full documentary tomorrow, the University of Northampton focus on ICUN targets and the sustainability of driven grouse shooting.
The ICUN targets for long term sustainability are based around three core principles: social, economic and environmental.
It's these that Prof Crabbe from the University of Oxford, along with the University of Northampton research team, based their study on and found that driven grouse shooting offers "the most sustainable form of moorland management"