I have been asked to reply.
(a) We estimate the annual emissions of carbon dioxide from domestic aviation in accordance with the IPCC 1996 revised guidelines, as we are required to do under the United Nations Framework Convention on Climate Change.
These guidelines were reviewed and revised in 2006; however, the 2006 guidelines will not be implemented until after the 2008-12 Kyoto protocol commitment period.
Full details of both the 1996 revised guidelines and the 2006 guidelines can be found on the IPCC website at the following link:
(b) Estimates of UK carbon dioxide emissions from all sectors, including domestic aviation, covering the period 1990 to 2008 were published by DECC as National Statistics on 2 February 2010.
These form part of the UK’s greenhouse gas inventory submission for 2008, and represent the latest available estimates.
The statistics can be found at the following link: