Do you know if the Guardrail types will be operated by AAC or RAF?
I read that the B350 Guardrails are for an army role (presumably 651 sqn, alongside the Defenders). However, I can imagine the RAF might argue that the B350s are a bit big and heavy for AAC, and may argue that they are better suited to operating them, given that they already have plenty of B200s.
I also read about a year ago on Arrse that there was a plan to transfer the RAF Northolt Islanders to 651 Sqn, in return for ceding the Kingairs to RAF control. It would seem to be a fairly sensible plan.