[AJW]

Guv’nor kind of belongs to an older generation it shows deference to the person it’s applied to.
The only places I know of that it is still living on are the Police who use it as an informal greeting to direct superiors and football players who refer to the Manager as guv'nor.
Gaffers a more informal version that’s used in the building trade to refer to the Forman and in the film industry for a particular skilled trade I can’t remember which.