Afghanistan: British troops face longer tours for security handover

British troops are to start serving longer tours in Afghanistan from October.

Soldiers deployed this autumn and next year will serve up to 9 months, instead of the usual 6 months.

Up to 3,700 personnel could be affected by the change, which means troops will remain in Afghanistan into 2015 - after combat operations are expected to end - to help return valuable equipment to the UK.

From now on, the Afghan army will increasingly be in charge of their own security.

The BBC's David Loyn has been with Afghan troops on an operation against the Taliban near the border with Pakistan.