To ask the Secretary of State for Transport what consideration he has given to the impact of the potential use of hand-held surface to air missiles on aviation security. 
My Department's approach is to manage the risk to the industries arising from the threat of a terrorist attack. The security measures imposed seek to minimise the industries' vulnerabilities while recognising operational realities. The Government's aim is to set the measures to counter the risk.All the security programmes are kept under continuous review. It is not our practice to detail the required security measures for obvious reasons.
To ask the Secretary of State for Transport what research he has commissioned as part of the Government's work for the Aviation White Paper. 
The Government have commissioned a substantial body of work in connection with the proposed air transport White Paper. Most of the work has been carried out as part of the Regional Air Services studies relating to the North of England, the Midlands, the South West, Scotland, Wales and Northern Ireland; the Regional Air Services Co-ordination study; and the South East and East of England Regional Air Services study. This work is formally categorised as consultancy rather than research. The relevant reports are listed in the Annexes to the regional consultation documents on the future development of air transport in the United Kingdom, as follows.
|The Future Development of Air Transport in the United Kingdom: Wales||D|
|The Future Development of Air Transport in the United Kingdom: Northern Ireland||D|
Copies of the consultation documents have been placed in the House Libraries and are also available on the Department for Transport's website www.aircconsult.gov.uk.
The Department has also commissioned or is supporting research in a number of areas to inform ongoing policy development. This includes research into the impact of aviation on climate change, the subjective perceptions of noise, Deep Vein Thrombosis, and aircraft engine emissions. In addition, we have offered a substantial contribution to help fund an international study (under the auspices of the International Civil Aviation Organisation) into establishing a global emissions trading scheme in which aviation can participate.
To ask the Secretary of State for Transport how many properties have been compulsorily purchased by the Civil Aviation Authority in each year since 1999. 
There has been no compulsory purchase of property by the Civil Aviation Authority since 1999.