Nick Sardonic and amoral, though not wholly unsympathetic; didactic in manner.
George Genial, personable, well-meaning but weak-willed.
Milly Emotionally volatile and a little scatty; fairly young, preferably pretty.
Mary Sensible, down-to-earth; affectionate without being at all sugary; a strong character on the quiet; similar in age to George.
Vicar An earnest, forthright, organising type.
Joan Fortyish; twittery but with predatory aspirations.
Set
Basically curtains, with entrances DR, UR and UL. A tall stool or (better) a high-backed swivel chair down right is occupied by Nick; other characters may use the rest of the stage, but light spill between the two areas must be as little as possible. In the general area are a settee and one or two tables according to available space. One of the two tables, or a part of the only one, serves as an office desk, with telephone and desk diary, and a suitable chair: the other doubles as breakfast/committee table, with three dining-type chairs.