The soldier was from 22 Engineer Regiment, Royal Engineers. He died on Monday while the helicopter was taking off in Zabul province in southern Afghanistan. Next of kin have been informed.
His death brings the number of British fatalities in Afghanistan since 2001 to 175, four short of the 179 deaths recorded during the six-year military campaign in Iraq. The vast majority of the deaths in Afghanistan have occurred since the operation in Helmand province began in the early summer of 2006.
Review ordered as defence spending hits crisis level
The Government has ordered a full-scale strategic defence review to try to solve the biggest crisis in Armed Forces resources for decades.
Work is to begin immediately on the consultation process and the results will be published in a Green Paper early next year with the review to be launched after the general election.
The need for a full review has been obvious for some time and ministers and senior officials at the Ministry of Defence have been talking privately about the issue for months.
The last strategic defence review was held by the incoming Labour Government in 1998 when George Robertson, now Lord Roberston of Port Ellen, was Defence Secretary.
The move has been forced by an increasingly constrained defence budget. Real-term increases over recent years have failed to keep pace with the cost of equipment and the intensity of the operational commitments overseas, especially in Iraq and Afghanistan.
The Treasury has been forced to spend billions of pounds from the reserves to buy better armoured vehicles off the shelf when it became clear that the models sent to Afghanistan, such as the Snatch Land Rovers, were too vulnerable to Taleban roadside bombs.