In message , Nick Leverton
writes

Yup, I'd missed that he had rung the electrification control room (and
hopefully waited for the OK though we don't know that either !)

His words reported in the Daily Telegraph:

"Once I was informed the power was off I went onto the track and removed
the trolley ... Later that week I was told ... that the power hadn't
actually been turned off".

--
Paul Terry