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She told the BBC's Sunday with Laura Kuenssberg programme that government running costs would be cut, with savings made from back office and administrative roles rather than front-line services.

Some see sense in mergers, cutting out the duplication of back office costs and the notoriously high salaries of principals.

Alexander said the DfTO is key to ensure that Great British Railway "doesn't end up as an umbrella of 16 separate organisations, each with their own incentives, back office systems and structures but instead becomes one integrated team, relentlessly focused on the passenger".

"I was isolated from the human environment. Every move that I made was scheduled, when to wake up, what to do when and when to sleep? A 24x7 camera monitored every move and sent data about my activities and health to the back office," the 24-year-old who did not want to be named told me.

"Such actionable data not only encourages communication between teams on the construction and back office operations, but also informs forecasting, planning, and purchasing decisions," she says.