Sorry if I'm sticking my nose in again.
Have checked with elder relatives.
There were 2 Collins households. Portallo and Redcar.
The Portallo address would have been about 76, where Gerry stayed.
Redcar definitely 2nd from Castlereagh Rd end, Portallo side.
Manuel was believed to stay there, maybe he stayed with aunt/uncle if he was Gerrys brother.
The Bates family was end house, Portallo St, probably 98 .
Gordon's father was Jackie Bates , the ex NI snooker/billiards champion.
I remember he was a minor celebrity for a while as he appeared on local TV early 70s doing trick shots. Their shop was near the Royal chippie on the Beersbridge and was burnt cause he wouldn't pay
the "unofficial" tax.
Id be interested to see the street directory myself, maybe somebody in Geneology could help.
Hope I'm not meddling, good luck.