misappropriation of Service equipment and supplies
As one who until a year ago managed an airshow inventory; I can tell you with absolute certainty that the 'air show' paid for all consumables including office supplies and postage. At MoD rates, a visit to Staples or Smiths proved beneficial on occasion. The only MoD liability fell on wear and tear of items held lng term on inventory and also used on numerous stations events / open days / mess functions / Royal visits etc etc rather then the exclusive use of the airshow.
Accomodation was the exclusive domain of visiting military units and all civilians were accomodated in university accomdation which is standard pratice with UK military airshows - or was!