[rjmunro]

The trial was at a station with 2 parallel escalators going in the same direction, giving 4 lanes of people. Instead of having 2 standing lanes and 2 walking lanes, they had 3 standing lanes and 1 walking lane. The goal was to reduce queuing for the standing lanes. The walking lanes are usually a lot less busy.

[wikfwikf]

When I travelled through Holborn during this period, they had changed both of the up escalators in the main bank (ticket hall down to Central/Piccadilly fork) to 'standing only'.