The Energy Crops Scheme (ECS) is part of the Rural Development Programme for England. It runs until the end of 2013, as does the RDP itself. The scheme provides a 50% grant towards all eligible costs. Further reading and guidance can be found at http://www.naturalengland.org.uk/ourwork/farming/funding/ecs/
Under the current scheme, they will honour agreements signed on or before the end of Dec 2013, and this will include multi-year plantings. So in theory an agreement could encompass planting in Spring 2014, 2015 and 2016, or any variation thereof.
Worth looking at.