The line by paddington has long sections where the tube runs in parallel, in one of the pictures you can see a lot of people walking towards a tune depot and so

The line by paddington has long sections where the tube runs in parallel, in one of the pictures you can see a lot of people walking towards a tune depot and somebody is crossing one of the lines with a middle rail which is part of their DC electrification system (I assume this had been turned off - but this may have been turned off because they realised people were on the line, not the other way round).