As I understand it the last time the Hastings dropped a Jeep was during Suez. By 1956 the UK heavy drop system was the MSP, which as the Beverley hadn't yet been cleared for the MSP, and all MSP drops were conducted for us by the USAF from C-119. Of course as the US didn't want to help us (officially anyway), the french or Isreal during Suez the heavy drop requirements of the assualt had to fall back on the crash pan system used on the Hastings. Luckily the AATDC at Old Sarum still had some support beams and the required parts to rig a jeep and a six pounder anti-tank gun for the drop in their museum.
The loads were rigged by a REME Sergeant who was allowed to go to Cyprus to see the loads off but was forbidden (much to his disgust) from going on the operation as he was required back at Old Sarum to help devise the method to be employed to drop some 105mm recoiless rifles given to the UK by the US (Remember officially the US was not helping us).