Thank you for all these replies and I agree with you Dundee that the stories my well have become confused over time. Perhaps there were two disabled children in the Kerrison family, possibly some sort of inherited condition? The "disabled child" that my cousin was told about was said to have died in childhood, which fits with Irene who died at age 15 but Evelyn lived until 27.
I don't think it's worth pursuing this further, interesting though it is, as the information we really needed was the exact addresses for Flo and Harry Wrench in 1939/MAR. We now know that Flo was living at 144 Hayles Buildings with her sister and brother-in-law, whose family had been living in various flats (but not 144) in Hayles Buildings since coming to London from Cornwall. We were hoping to clarify exactly what happened and who moved in with whom, when Grandma, Ruby's mother-in-law, died in 1920 aged 47, leaving several young children to be brought up by her oldest daughter who, by then, had married my father's older brother - a tangled web indeed.
Thank you again for all the information, which I'll pass on to my cousin, and thanks also for being interested in my query and so willing to help.
