Thanks to everyone for the replies and trying to help. I appreciate it.
It has a Bowes Road badge meaning 1970s but because of the round fork and crown, like Hetchins, and the tops of the seat stays, I thought it might actually be 1960s, a Tottenham frame but repainted in the 1970s.
Anyway, I think I will just restore it with 1980s record. Cannot decide whether to have the lugs, rear end and fork chromed or just leave it. Paint is in good condition. It has only one shifter boss, I'd like two though!