Behind brassey street there used to be old victorian tenements called havelock gardens,
It appears they were built after 1945 and where Havelock St was. If they were flats I'd have thought they would look more modernish for that period.
Possibly what you may have seen were the old buildings in Havelock St just before demolishing and the building of havelock gardens.
Try click here
for 1970s aerial view that may jog your memory. Put in a ch41 postcode to get map and move map to that area and magnify
Sorry, my previous posts were Beaufort Square.
This one may be the correct one