The council, which has previously opposed plans to pedestrianise Oxford Street, said its role was now to ensure the transformation worked for local communities as well as for London.
Its leader, Adam Hug, said: “Westminster Council’s view on Oxford Street pedestrianisation is a matter of longstanding public record.
“Over the last 18 months we have secured a number of key improvements from the mayor of London’s original plans to ensure that the proposals for Oxford Street are more deliverable and better meet the needs of local residents, businesses, and wider London.
“These include ensuring that Oxford Street East transformation will be delivered in line with Westminster’s previous plans that retain bus access, and the council’s retention of strategic development funding.”