It's potentially be answered previously - so apologies for goping at it again - but does anyone have an explination for the Red Lines?
The theory behind them is to keep people safe on the platform to allow a bigger gap between the furthest point which one is allowed to stand on the platform, and the platform edge. The faded red line shows just how restrictive it used to be, but the newer red line shows an expansion of the area.
Personally, I don't quite understand it as in the normal timetable you get possibly one train an hour in each direction passing through non-stop. My argument is that there are more and more trains on P13/14 than ever, going to more destinations, and further destinations than before; so why we're packing people in a smaller area is unbeknownst to me. If your train arrives and you step forward to board, you get shouted at by the yellow army.
I could understand the lines somewhere down south, where a train could pass through a platform at up to 125mph, but at Piccadilly 13/14... nope.