McDonald's has pledged to help raise the standard of British agriculture in the run-up to the Olympics.

The fast food chain has promised to share best practice from farms supplying the Olympics with the rest of the farming community, to show farms supplying the 2012 games in national TV ads and to make the Olympics a global shop window for British and Irish produce.

"The farms supplying the Olympics are standard-bearers in terms of exacting quality and welfare standards," said UK CEO Steve Easterbrook.