Argh didn't know that it was already full scheme by the time i secured a position as a junior engineer on the project. At the end of the day there was limited grid points in Northumberland and Borders area so had to use what was on offer. CEGB were also quite worried at that time about the impact of Negative Phase Sequence currents arising from our unbalanced load and harmonic content especially in this area as there was limited generation to support the grid. This was why demand had to be constrained at some sites which was really only an issue under outage conditions. Unlike WCML the east coast EHV circuits ran a lot further inland so it wasn't practical to tap into that like WCML had done at Elvanfoot substation a decade earlier.Also worth remembering that Newcastle - Edinburgh was not part of the ECML electrification when it was first presented to the DfT for Authority. That was added on later, as an ‘even cheaper than chips’ extra.