Many years ago, one of the pilots on 750 squadron at Culdrose (where I was a stude at the time) had a scary moment during their trappers ride.
If my memory serves me correctly
Practicing a single engine asymetric approach on rwy 30 the Jetstream descended towards the runway, where it then came across the downwash of a Seaking hovering on the upwind side of the runway. The downwas rolled the jetstream rapidly towards the dead engine and the pilot only just managed to recover it from the ever increasing bank angle despite full left aileron.
The downwash from 2 merlins is just a scary thought, especially in alight aircraft.
Obs cop