Pop star Ed Sheeran has performed at two special concerts for British troops at Camp Bastion in Afghanistan.
Sheeran, who has scored several top ten hits, also boarded Apache and Chinook helicopters on the trip, which was organised by the British Forces Foundation charity.
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Two private citizens have already paid a "significant deposit" to take the week-long trip.
Slippy start tomorrow with frost & ice
The court will determine how much the UK government and travel firms knew about the risk of an attack on tourists holidaying in the area.