thelynxeffect. My apologies for misidentifying your background. I must point out that RAF groundcrew are not [with the greatest of respect to your former life] Squadies, they are skilled technicians and if we do not do our best to retain them all too many will leave at the first available opportunity. The apparent lack of flexibility of this allowance system is just adding more straw to the camels burden and increasing the likelyhood of them hoofing it.