S777,
It's SOP [Standard Operating Procedure] for the UK Military to do "Practice Diversions" to most Civil A/Fs in the UK.
EG, Hawks:- Valley to Liverpool/Warton VFR return.
Jetstream/HS125s Cranwell Navex, plus Approach and 'Go Around' at TeesSide/Leeds/Newcastle
Leeming [Tornado F3's] Linton [Tucans] ALL do Navex/Airways Training and 75% end up in an "approach" to a Civvie airfield
we aim to please, it keeps the cleaners happy