British troops will be leaving the Sangin area of Helmand province to be replaced by Americans by the end of this year.

Now a former Captain in the Royal Irish Regiment, Patrick Bury, has written a vivid account of his experiences which is being published later this summer, under the title Callsign Hades.

Mr Bury speaks to Today presenter James Naughtie about his experience.

Get in touch with Today via email , Twitter or Facebook or text us on 84844.