Rapier (missile)
"Within the total only five Argentine aircraft might have been shot down by Rapier, and, as originally noted by Ethell and Price, only one of these was certain, with two probables and two possibles. Similar discrepancies arose over other weapons systems, notably Blowpipe (one confirmed kill as against nine confirmed and two probables in the White Paper) and Sea Cat (zero to one against eight confirmed and two probables in the White Paper). […] This confirmation that MoD had exaggerated, however unwittingly, the capabilities of Rapier was deemed to be political dynamite. It was observed that if this assessment became publicly known it 'could have a serious adverse effects on sales' prospects for Rapier, which is the staple revenue-earner for BAe's Dynamic Group."