I'm afraid I'm unable to answer that question. I don't wish to be unhelpful, but the detail around armed forces compensation payment is very much a Ministry of Defence issue and they would have consulted at that time, so I'm not in a position to comment on the reasons behind the increase. I would suggest one of the reasons why they looked at it again would have been the increased operations internationally through the Gulf War, Iraq, Afghanistan, etc.
On June 6th, 2013. See this statement in context.