I have nothing to add to the answer that I gave to the hon. Member on 14 October 2008, Official Report, column 1016W.
The ratio of UK Apache helicopters to UK Chinook helicopters deployed in Afghanistan is approximately 1:1.
I am withholding information regarding the ratios of UK deployed personnel and Chinook and Apache helicopters as its disclosure would, or would be likely to prejudice the capability, effectiveness and security of the armed forces.
Afghanistan continues to present significant security challenges, particularly, in the south and east of the country where the Taliban continue to use intimidation and violence against the local population. In Helmand, progress has been made along the Helmand river valley and we are expanding control with the Afghan Security Forces taking an ever more active role.
The Department continually studies every aspect of our continuing operations in Afghanistan to identify and learn lessons in order to improve our operational capability. This work contains sensitive information and is therefore being withheld as its release would or would be likely to prejudice the capability, effectiveness and security of our armed forces. The Department does routinely engage with the Defence and Foreign Affairs Committees on such matters as lessons learned from operations, and these reports are already widely available in the public domain.