This is a problem of both a shrinking UK military and an expanding export market. A much smaller pool of military engineers from which to recruit for UK contractor led support. Add to this the export of the likes of Typhoon to new markets that lean on UK ex-mil recruitment, and Boeing exporting Apache to the likes of Australia, Poland and needing contractor support to US Forces in Germany, Middle East and the like, amongst others. The same applies to Typhoon QFI and QWI's, Apache aircrew instructors et al. UK struggles to recruit for a smaller workforce and the external pull factors are vast.