The Mayor of London has vowed to push through the stalled tram extension to Crystal Palace, despite no concrete plans on how to pay for it.

The much vaunted £170m plan was abandoned in November 2008 due to lack of funding, alongside £3bn of other transport projects across the capital.

But Boris Johnson confirmed on a tram trip today the scheme was back on the agenda ahead of the looming mayoral elections in 2012.

He said: "It's always been our ambition to extend the Croydon Tramlink.

"Today we announce we're going to extend it to Crystal Palace.
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Mr Johnson's Labour opponent in the mayoral race, Ken Livingstone, has already promised to get the extension back on track after criticising the Mayor for dropping the scheme.