Mr Coffman,
I am not sure if any vehicles were ever dropped using ULLA from our Ks.
I know the US did use the system they called LAPES to drop graders. some interesting film on youtube including some terrifying crashes and what they called mishaps.
HSP started life on the Beverley. AA62 would have been amongst the few who dropped HSP from the K. In my time since mid 90s it was dropped on Purple Star and once at Cerney or Kevil (memory fades) with the CVRT. I hope the last remaining platform made its way to the Airborne museum at Duxford safely.
I am pretty sure that there is some amazing video of ULLA, MSP and other things at JATE.