National Grid has approached UK Power Networks to request that the 132kV dual circuit overhead line between Twinstead Tee and Burstall Bridge be transferred to National Grid ownership to be dismantled and replaced by a 400kV overhead line.
These documents provide further information. The last document details responses to supplementary questions asked by interested parties as a result of a consultation by National Grid, to find a preferred location for a new electrical substation as part of the scheme:
This project has now been postponed by National Grid. See here for more details.