Well, for those already retired from HM Forces:
From Hansard Written Answers for 19th Jan 2010.
House of Commons Hansard Written Answers for 19 Jan 2010 (pt 0001)
Armed Forces: Pensions
Nick Harvey: To ask the Secretary of State for Defence what effect the negative level of retail price index inflation in September 2009 will have on the level of armed forces pensions in the next 12 months. [309734]
Mr. Kevan Jones [holding answer 11 January 2010]: Public service pension upratings are linked by primary legislation to those for additional state pensions, such as the state second pension, and the uprating in April 2010 will take account of the rate of inflation over the year to September 2009. As announced at the pre-Budget report 2008, legislation governing uprating for additional state pensions means that in the event of a negative Retail Price Index (RPI), benefit rates will be protected at least in nominal terms (i.e. not reduced on account of deflation), thereby providing an increase in support in real terms. The RPI change for September 2009 was minus 1.4 per cent., therefore benefits will remain at current levels.
So nothing if you have already gone.
Even worse, is the fact that whilst DWP Benefits (for the great unwashed in a lot of cases) rise, no mention whatsoever of any increase whatsoever for those receiving either AFCS or War Disablement Pensions instead of the equvalent 'civvy' DWP benefits.
It is a point not missed by many veterans.