There are no plans to send Challenger tanks to Afghanistan at present.
The number of attacks in Afghanistan has increased significantly from 2005 to 2006. It is estimated that, in 2005, there were approximately 500 improvised explosive device (IED) attacks, of which approximately 25 were suicide IED attacks. In 2006, it is assessed that there were approximately 1,525 IED attacks, of which approximately 150 were suicide IED attacks. These figures do not necessarily represent the complete statistics but are an estimate. The majority of attacks are against International Security Assistance Force (ISAF) troops or Afghan National Security Forces (ANSF); however, it is not always possible to define the specific target in any given incident.
Of the total international security assistance force of around 35,500 troops, provided by the United States, Germany, France and the UK, the approximate percentages are as follows:
Percentage US 39 Germany 8 France 3 UK 15
The UK contribution will increase to approximately 21 per cent. once the force enhancements announced on 26 February have deployed fully.