The only thing I haven't worked out is the 'Borough' clue, although I know it must be the one that's the same as the surname of a person who has to go 'to the right'. I see jagomel asked for help with this but didn't get it. I'm always annoyed when I finish a puzzle without having parsed every clue.
Can offer help if needed in return for help received.
The duo, the title and the resolution of the ambiguities all jumped out at me when I saw how the central column was shaping up. To those who found the theme obscure, all I can say is it helps if you were around in the 70s. I didn't bother to do the meticulous counting, which *was* unnecessarily obscure.