Not strictly a supply issue but this did involve members of the supply branch (aka ‘movers’).
I was tasked to fly to Keflavik to collect a load that was listed as ‘priority freight’ and I would conduct training for the pilots there and back as well. The movers then said that due to ground handling restrictions at Brize Norton (the infamous ‘MOG’ - Movement on Ground) they couldn’t allow us to fly… Ops then said that we would fly the trip but empty (circa £40k/hr) thus achieving our training and another ac would be laid on to collect the load later in the week (at £40k/hr).
I suggested that this was completely absurd and spoke to OC Movements who had been one of my students many years before and the task was permitted to go ahead and collect the load.