Hello Bricey,
The images you have posted relate to two different boxers.
Harry Davis (Bethnal Green), who appears on the fight bill, was a very good professional of the 1930s and 1940s who had two terrific fights with Jack Kid Berg. He was still very much alive in 1987 and appeared on the Kid Berg episode of 'This Is Your Life'. You can see the programme here:
http://www.youtube.com/watch?v=Ae_yky14xtI
The H.L. (Harry?) Davis mentioned in the obituary clearly died many years before that (aged just 31) and seems to have boxed as an amateur only (albeit a very successful one).
Jack Treadaway was a top amateur boxer in the 1930s - I've seen his name lots of times in '30s editions of 'Boxing' (forerunner of 'Boxing News'), so presumably your great uncle was a contemporary of his. How sad that he died so young.