Number of British soldiers killed in Afghanistan at 404 The incident is the single biggest British loss of life in the Afghanistan campaign for six years, bringing the total number of deaths to 404. The soldiers were killed on patrol when their Warrior armoured vehicle was caught in a blast on Tuesday evening. All six occupants were killed, including five soldiers from 3rd Battalion The Yorkshire Regiment and one from 1st Battalion The Duke of Lancaster's Regiment. The families of the dead have all been informed. Ten British soldiers have been killed in Afghanistan so far in 2012.