The three escalators linking Waterloo tube station to the mainline concourse have been closed this week for the start of refurbishment work expected to last until November.
"With just two escalators working, passengers would be reluctant to find an alternative route. It would put an enormous strain on those two escalators, which would struggle to cope with the number of people using them.
"This essential work is part of TfL's £10 billion investment over the next five years to improve and expand the capital's transport network. Although there will be some inconvenience, all the rail and Tube services are still accessible.
"Once the work is completed the three escalators will be fully reversible, which will allow far greater operational flexibility than before."
For the latest local news and events direct to your inbox every Monday, you need our weekly email newsletter SE1 Direct.
7,000+ locals read it every week. Can you afford to miss out?
Read the latest issue before signing up