I once had to 'explain' to an NRCC controller why we couldn't just 'punch out' from low level and divert to Glasgow for a night stop as we approached the fuel dump at Killin, at night in a blizzard , as we attempted to rtb Leuchars in a Wessex following a successful rescue of a faller on Ben Vorlich. The controller on that occasion was ex VC10 I believe. That was pre ARCCK, it couldn't happen these days surely; could it?