I'm reading a novel set in London in 1922. An impoverished widow, house-rich, cash-poor, who is forever worrying about spending sixpence here and there, and how to pay the coal man.
However, there is no mention of income at all, except she is astounded that a neighbour, who had just been promoted, is now earning £200 a year.
As far as I can tell, googling here and there, a decent wage for a working man might have been £2 10s -- £3 a week, or about £120 - £150 a year. Does that sound about right?