“The Future of Air Transport” White Paper, 2003, referred to the fuel efficiency gains that could be achieved arising from fleet replacement and technology improvements.
The Department for Transport carbon dioxide forecasts and underlying assumptions are published in “Aviation and Global Warming”, 2004. This can be found at:
http://www.dft.gov.uk/about/strategy/whitepapers/air/docs/aviationandglobalwarmingreport
“The Future of Air Transport Progress Report”, published in December 2006, committed us to producing revised emissions forecasts in 2007.