There has been further develoments. Through Facebook I've managed to get in touch with four cousins, the sons of my late Uncle Ron Sayers, of the Royal Rhodesian Air Force. Because of the troubles in that country, they've now spread around the Southern Hemisphere.
1. Garry Richard Sayers - lives in Suth Africa.
2. Dirk John Sayers - remains in Zimbabwe.
3. Robin Sayers - lives in Perth, Australia.
4. Ross Sayers - also lives in Perth, Australia.
Ron's wife Barbara is elderly and frail, and lives in a care home in Zimbabwe.