Fewer sheep and cows expected
The authors anticipate around a 10% drop in cattle and sheep numbers by 2050 against 2017 levels. They say there's already been a reduction of around 20% in the past two decades.
Some upland farmers argue that on thin soils, the only productive use of the land is for livestock.
Minette Batters, NFU President said: "Plant-based products do not always necessarily have a lower impact on the