By Max Clarke

Union heavyweight Bob Crow and London Mayor Boris Johnson have long been on opposing sides of vicious battles of rhetoric: the former labelling Mayor Boris and his ‘millionaire cronies’ as union bashing bullies; while the latter referred to Crow as a badly behaved militant.

Tonight, for the first time, the two will meet in public in a head to head clash of personalities in a Surrey Grammar school.

The meeting between the “glowering, shaven-headed union bruiser”, as Crow was described in an article in the Evening Standard, and Conservative Mayor Boris will be for the BBC’s 'Any Questions’.

“This isn’t about personalities; it’s about a proper debate about exactly where Boris Johnson, the Conservative Party, and the Government that they lead are taking key services like transport.” Bob Crow, leader of the Rail Maritime and Transport (RMT) (RMT) Union said.

Continued Crow: “Boris Johnson has been a staunch defender of the banks and the City speculators who created this crisis and has even used gatherings of the well-heeled at places like the Mansion House to advocate ill-conceived and dangerous plans like driverless tube trains”.

Johnson has long voiced his opposition to strikes on the London Underground, deeming them politically motivated gestures that come at the expense of commuters and the London economy.

Tonight’s meeting follows today’s announcement that the RMT is to ballot power room staff for strike action over “dispute over pay grade progression”.