I missed it in '14, thanks.
It says it's the effect of 2 years of pay freeze and one of pay restraint. Compares 2013-14 to 2010-11. Involves promotion to make it sensible.
RPI:
Private L2 (2010) L5 (2014): +9.5%
Cpl L3 (2010) Sgt L3 (2014): +2.5%
WO2 L9 (2010) WO2 L9 (2014): -9.2%
Lt Col L3 (2010) Lt Col L6 (2014): -4.4%
CPI:
Private L2 (2010) L5 (2014): +11.4%
Cpl L3 (2010) Sgt L3 (2014): +4.3%
WO2 L9 (2010) WO2 L9 (2014): -7.6%
Lt Col L3 (2010) Lt Col L6 (2014): -2.7%
I guess if you're marking time as Flt Lt you're probably not far off the WO2 stuck at his top level. The private increase looks ok until you realise it's 11.4% split over 4 years, so still sub-3% a year.