None specifically on alternative fuels for aircraft but there are two small projects of interest: firstly, earlier this year the Department commissioned a study on carbon reduction options for domestic aviation. We expect to publish this shortly. Additionally the OMEGA project funded by the Higher Education Funding Council for England (HEFC) has a project investigating the possibilities and barriers for alternative fuels.
We are aware of the US CAAFI (Commercial Aviation Alternative Fuels Initiative) and various commercial trials which we are following with interest.