William Cassidy born circa 1896 tall and red hair lived in Lancashire, England a soldier during 2nd World War?

Question

In York barracks in 1934-1936

Answer 1

Not sure if this is who you're talking about, but if not you still might be able to find him on this website:

http://www.oneternalpatrol.com/cassidy-e...

Answer 2

Ask in the genealogy section where there would be more expertise available for you.

Answer 3

Try Genes Reunited. You can search their data base