Thank you for asking.
First of all, no the proposal doesn’t impact this power line, everything is fine regarding tagging on it.
Regarding the survey, you may go to both ends, on ground or on aerial imagery to look at how it ends in both substations, Lincoln Main and West Burton. Two circuits lines usually splits near of substations, here for instance.
Along the main section, mapper can check if the conductors go along without any connection to other lines, branch or split mainly.
Reading name plates on towers could also help to find particular points, to know which substations are actually involved.
Near of Lincoln Main, another split will certainly allows two circuits to reach different anchors/portals.
Once direct connectivity is known between two substations, it’s possible to build two relations following the conductors along the lines segments.
In this process, no public data has been used and it is observable from ground.