I tried looking for some births of children for Raymond & Mary. I made the dates for the births as 1963 to 1980. The following births came up...
Raymond D Greenhalgh b 1964 Glasgow North
Nicola Greenhalgh b 1970 Rutherglen
Christopher Greenhalgh b 1973 Glasgow, Martha St
Christina Rosan Greenhalgh b 1975 Glasgow, Martha St.
I guess Raymond may be a son of Raymond & Mary, but no proof until you see it on a certificate. Nicola was born in Rutherglen, which is on the south side. Christopher & Christina are given as Martha St. Martha St is the old Registry Office's address, near to George Square in the centre of Glasgow.