Second thread and really appreciate all the help, my maternal grandmothers brother Jack Patching married Mavis Olive Maud Mead, they were divorced and Mavis remarried a Don Martin. Before the divorce, Jack and Mavis had a daughter Wendy, I have a photo of her and my now 80 year old father and I assume by the looks of it she is roughly 2 to 5 years older than he.
Jack died at the age of 34 suddenly, Mavis died in 1966. I have tracked them but can not find a trace of Wendy and her descendants.