The biogas will be produced from 41, 000 tonnes of maize, grass silage and food waste from local farms and businesses, including Poundbury-based Dorset Cereals and the House of Dorchester Chocolate Factory.

BBC: Prince Charles opens Dorset food-powered biogas plant

Rain over the summer has meant a poorer quality of grass silage, and the farm's maize crop is also expected to produce lower yields when it is harvested in the coming weeks.

BBC: Richard Downes