Mark Evers, chief customer officer at TfL, said: “Our vision is a London where everyone can move around the city safely, comfortably and sustainably.

“Access to public transport is fundamental to this, and we know that there is still much work to be done.

“Over the last year we have made the first steps to deliver more than 80 improvements to our network to make it more inclusive and accessible, as part of our Equity in Motion plan.”

Mr Evers said TfL staff received ongoing customer service and disability equality training, which was developed “in conjunction with and delivered by professional trainers with lived experience of disability”.

He added: “We will learn from Kelsey’s experience to continue improving our services.”

TfL says its turn-up-and-go service is offered on the Tube, London Overground and the Elizabeth line.

Staff at the station gate are expected to help customers plan a step-free journey, and assist them “through the station and on to the train, and arrange for staff at the destination station and any interchange stations to support them off the train including deploying boarding ramps if required”.