Yes, thank you all for your patience and careful checking. My apologies for persisting with the error.
You are quite correct that the Alan we seek is not the Alan T(homas) who married Brenda.
I'll go through these suggestions and will get back to you. Regrettably the BC of 1931 will take about six weeks to reach me. Meanwhile I am following up the possible current connections Kay99 mentioned - the grave flowers and the family tree.
Allan and Kathleen divorced at some date, and both also remarried. Does GRO keep divorce records and how do I reach them?
Stay tuned
Thanks again
Ratty