Why Sussex?
There are 4 births on FreeBMD: 2 in Surrey SW in the 1940's, and 3 in Nottingham in the late 1950's.
There are 5 Marriages (also on FreeBMD), 4 in the 1940s.
These are in Surrey Mid E, Surrey SW, Eton, and Northumberland. And one in Uckfield in 1960's.
Have you looked at Telephone Directories? Available on Ancestry.
Not naming any names, just in case some are still living.