With voting underway for the Labour mayoral candidacy, Ken Livingstone has brought out the big guns: he’s promised to revive Cross River Tram. The project, introduced in 2005, would have brought trams back to central London via a route that linked Peckham and Brixton in the south with Camden in the north via Elephant & Castle, Waterloo Bridge, and Euston. It was axed early in Boris Johnson’s reign, but according to SE1, Ken has vowed that, as Mayor, CRT and a host of other stalled transport projects would go ahead “when economic conditions improve”. Ah. That’s some caveat. Still, banging on about trams wlll probably unsettle Boris — he’s already riled by the prospect of a Labour campaign that focuses on transport.