Metro back in the 70s

This map, originally produced by TWPTE, shows Metro as it was envisaged back in the 70s, with the line west of Regent Centre, used as a mixed freight and Metro line, and with the avoiding lines round the Metro depot at South Gosforth shown as two lines, not one.

Also of interest is that the map shows the original chords between the Metro network and the ECML at Benton.