I have noticed from Series 3, at the end of each episode when Arkwright gives his little monologue a black cables appears to run from the shop to across the street, see picture.
It does not appear at the start of the episodes, it is to feed lighting power or for some other reason, I suspect they film the endings of the episodes at the same time all in one batch

It does not appear at the start of the episodes, it is to feed lighting power or for some other reason, I suspect they film the endings of the episodes at the same time all in one batch
