Boris Johnson has signed off on his tenure as Mayor of London with a promise the Sutton tram extension will get built - despite failing to approve the project during his two terms at City Hall.

As Londoners prepare to go the polls tomorrow to choose his successor, Mr Johnson today posted a video on Twitter to sum up his eight years as mayor.

In the clip, bizarrely described by Mr Johnson as the "final shuddering surge" of "Operation Juddering Climax", the outgoing mayor expressed his hope that "everything good we've tried to do in this city is now taken forward".

He added: "All the things that we've cared about so much in the last eight years, I really hope they will be protracted on tram lines - like the Sutton tram line, which we're going to build by the way".

How Mr Johnson intends to oversee the completion of the massive infrastructure project - which he first expressed support in 2010 - after he leaves City Hall tomorrow is unclear.

During a session of Mayor's Question Time in September 2014, Mr Johnson committed to giving a firm decision by the end of that year on whether the Sutton tram extension – estimated to cost about £240m - would go ahead.

SEPTEMBER 2014: Mayor Boris Johnson to make decision on Sutton Tramlink 'by the end of the year'

The GLA member who asked the question, Steve O'Connell, Conservative representative for Croydon and Sutton, said last week he was disappointed extensions to the tram network to Sutton and Crystal Palace were so far yet to materialise.

Mr Johnson also used his video to urge voters to back Conservative mayoral candidate Zac Goldsmith, who has trailed behind Labour's Sadiq Khan in the polls in the weeks leading up to the vote.

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