From around 65 years ago:
Flying training within the (RAF) Swift FR5 force was realistic. Legs between targets were normally flown at 420 knots rising through 480 to 540 knots (up to a maximum of 600 knots when desirable and practicable in simulated hostile airspace) according to the task. Officially, operational training was carried out at the lowest permissible height in Germany (then 250 ft above ground level) in preparation for lower heights in war,
To train for rapid response in war, planning might be carried out against the stopwatch, with 30 minutes the standard time allowed to plan a three-target sortie over 380-400 miles. Each target had to be covered in one pass, at tacticsl speed and height, ideally with an IFREP transmitted (even blind) whenever the facility was available as soon as possible thereafter.
Long before the days of GNSS, INS, automated planning systems and the like - just paper charts, G4F compass and stopwatch. Single seat, 'German' LL Wx and no navaids.
I wonder whether many RAF pilots could match that sort of skill these days? OK, I know that high speed FJ LL isn't the be-all and end-all that it used to be, but surely it's a skill worth maintaining?