He will be leaving Transport for London to chair a delivery authority responsible for restoring the Palace of Westminster.

Mike first joined London Underground in 1989, becoming its chief operating officer in 2003 and later managing director after a spell running Heathrow Airport. He was appointed transport commissioner in 2015.

He is credited with leading a multi billion pound transport investment programme including Underground line upgrades, overseeing a new focus on improving road safety and air quality and encouraging a shift to public transport, cycling and walking.

But his tenure was also marked by a phasing out of central Government funding to Transport for London and delays to Crossrail.

“I'm proud of what has been achieved at TfL and I'm proud of having served and delivered for the Mayor,” Mike said. “In spite of the challenges that London has experienced at times over the years, TfL is an organisation full of the energy, ability and passion to make this an even better city for all.”

Mayor of London Sadiq Khan said: “Mike deserves huge thanks for the exceptional service he has given to London, both for the excellent job he has done as TfL Commissioner, but also for all the work he has done for the capital since starting at TfL in 1989.”

Also in London, a 10 week consultation has opened giving latest proposals on extending the Bakerloo Line from Elephant & Castle towards Lewisham via Old Kent Road and New Cross Gate. A further extension is also detailed towards Hayes and Beckenham Junction.

Views are being sought on names for two proposed stations, although Transport for London has said that the most popular names chosen by the public will not necessarily be the names given to the stations.

(Photograph: TfL)