Are there any JP4's still flying just out of interest?
Yes - I Flight Checked G-BXLO last month, and regularly instruct on G-PROV. The owners will claim the latter is not a JP4, but T52
Essentially was a JP4, got armed up for the Middle East, and still has Gun Ports / Weapon Switiching stick tops and Air-Con, and is flown using JP4 manuals/techniques etc.
See
Swords Aviation at North Weald.
NoD