Where is the longest stretch of electrified track in GB that is normally fed from one end only?
This could be
(1) a stretch from a feeder station to the end of a line
or (2) a stretch from a feeder station to a point where electrification ends and the line continues unelectrified
or (3) a stretch from a feeder station to a track sectioning cabin where the other side is normally fed from a different feeder station.
A "stretch" for the purposes of this question could include parts of more than one line. For example if you want to know where the juice comes from to feed Blackpool North, you have to include, for a start, the whole Preston-Blackpool line, which has no feeder station of its own; but you must then also include also some distance north or south along the WCML to a feeder station. (I imagine Blackpool would normally be fed from Catterall, about 8 miles north of Preston.)
This could be
(1) a stretch from a feeder station to the end of a line
or (2) a stretch from a feeder station to a point where electrification ends and the line continues unelectrified
or (3) a stretch from a feeder station to a track sectioning cabin where the other side is normally fed from a different feeder station.
A "stretch" for the purposes of this question could include parts of more than one line. For example if you want to know where the juice comes from to feed Blackpool North, you have to include, for a start, the whole Preston-Blackpool line, which has no feeder station of its own; but you must then also include also some distance north or south along the WCML to a feeder station. (I imagine Blackpool would normally be fed from Catterall, about 8 miles north of Preston.)