You won't catch me trying to listening to Military traffic. it's
a complete waste of time. I went through the 70's 80's when
you could listen to the Military in CW, SSB, RTTY. Those days
are long gone. It's all encrypted SATCOM now.
HF radio would just be a backup system.
But it does seem your hell bent and very passionate about
following the Military. Maybe a better way to get your Military
fix is not through HF radio but through the flight apps that show
Military aircart activity in your area of the UK. Like ADS-B Exchange.
I just checked that site and there are fighter jets
training around the UK right now. Just hit the MILAT filter
brown button on the right and the button below that
to turn the filter on.
You will be in Military Air Force Heaven.
ADS-B Exchange - track aircraft live