Gregers - AZNA not BFZL was the only Viscount to be painted in the all-blue scheme (perhaps a spotterish thing to point out; I beg to be classified an enthusiast!).
I spent 2 student summers as an aircraft cleaner at East Midlands (£2/hour as I recall) and have happy (?) memories being 'bog man for the day', which involved teetering down Viscount steps, big galvanised bucket in hand, to pour contents into bigger bucket on the back of the bog wagon. AZNA had an upmarket 'bucket' (part of the paintjob) incorporating a flush...
Too much detail here perhaps.
AZNA was joined by BAPF and BMAT as the last gasp of the BMA Viscount fleet. (There was a super article in Propliner sometime later following AZNA's departure, chronicling 21 years of BMA Viscount ops - or was it 21 Viscounts in total ...).
I remember being fascinated by PF's asymmetric tailplane - the trailling edge met the tailcone at slightly different points (I don't remember seeing this on any of the others). Why - propwash, or spare-parts-itis?
The sound of 4 darts was part of my growing up - the Heralds and F27s just didn't have that richness of timbre.