Britain is devoting so much of its wheat crop to biofuels that it it slated to become a net importer of wheat. Dr. Madsen Pirie writes at the Adam Smith Institute blog:

Of all the insanities committed in the name of green politics, one of the most insane is the production of biofuels from food crops. In pursuit of increased proportion of energy from renewable sources, governments have realized that wind and solar power cannot make sufficiently large contributions. They have therefore turned to biofuels, a move that hugely delights their farming lobbies.
Left at that, this might not have done too much damage outside of a massive misallocation of resources, but in a move that compounds insanity with thoughtless wickedness, they have chosen to do so out of food crops, rather than push forward the development of fuels from biological waste products such as husks, stalks and other cellulose surplus.
Now Robin Pagnamenta reports in the Times that “Britain’s self-sufficiency in wheat will end next year because a giant new biofuel refinery needs so much of the staple crop that home-grown supplies will be exhausted.” Yes, we are now buying wheat on world markets to turn into fuel that is more expensive than that we can buy elsewhere or pump out of North Sea wells. That puts upward pressure on world prices, forcing up the price of foodstuffs. To affluent people this will be an inconvenience; to the poor it might mean starvation.

The rest here.