On Tue, 12 Dec 2017 22:52:34 -0000 (UTC)
Recliner wrote:
Basil Jet wrote:
Aren't the substations on the deep lines just as exposed to the weather
as the substations on the surface lines?

Some may be, I think others are in shafts. But not all open lines were
affected, either. For example, the District line was fine. The closure of
the whole Met and Uxbridge branch of the Picc probably was a power supply
problem; the later problem on just the Amersham branch was more likely to
have been icing on the rails.

Sure, a major power supply problem that hasn't happened since god knows when
and purely coincidentaly happens on the first major snowfall in london in 4
years. Riiiight.