I'm not convinced that the 6FTS 'Multi Engine Refresher' course was much better. It was my one and only experience of that flying abortion, the Jetstream T1, and was probably the biggest waste of time I've ever experienced.
After my Gnat/Hunter training at Valley/Brawdy, followed by what turned out to be a pre-Vulcan Buccaneer 'lead-in course...
', I'd flown 1000 hrs on the Vulcan without having had any Varsity or Jetstream flying. Then was binned from the F4 after 500 hours on that, to go to the VC10K. After 15 hours on the worthless Jetstream, I escaped from Finningley and held on 241 OCU until my course started. I learned infinitely more sitting and watching from a cushion on top of an Airlarda box behind various VC10 captains than I did from Learning Command's Let's Make Trucky-ing Look Difficult 'refresher' course.
I summed up one trip by saying "If it was really that hard to go from Finningley to East Midlands at 2.5 mile per minute, I'd go by train!".