Once upon a time there was navigator on 511 squadron (Britannias), lets call him Fred Bloggs, who could honestly be described as a real character. All name tags for the Britannia fleet were sourced from Changi Village, so a 511 crew member on a Changi slip was detailed to buy a large batch of F. Bloggs name tags. At an appropriate occasion (I think it was an inspection) all navigators, plus several pilots on 511 became known F Bloggs.