Welsh Assembly rural affairs minister Carwyn Jones demonstrated his green credentials at the show by backing environmental schemes and plugging renewable energy.

Mr Jones took to a bike to generate electricity as part of the World Wildlife Fund’s Climate Challenge Campaign.

The minister shed his jacket and tie and went head to head with – and beat – Morgan Parry, WWF’s Wales director, to raise awareness of alternative, renewable, more environmentally friendly ways of making electricity.

“Tackling climate change is a central theme in the Welsh assembly government’s environmental strategy,” the minister claimed.

The challenge demonstrated the benefits of eco-friendly cycling as a means of transport, and that fossil fuels were not the only source of energy.

In a competition between the two rival Welsh farming unions, Huw Thomas, NFU Cymru’s Welsh Assembly adviser, generated more power than Arwyn Owen, the FUW’s director of agricultural policy.