I'm presuming your father was a Florey at Birth?
If his family goes back to the Florey's in Burma then l have nearly the whole family tree down to my Grandfather and siblings. I don't have a Sheila Irene on there but they did emigrate to england and who knows, most of my tree is on Genes Reunited.
Most of our Florey's lived in Lewisham and surrounding areas but there were some that didn't.
I hope l can help you out if you are the same Florey's