Conservative politicians are calling for a ban on tube strikes - arguing that they should be replaced with a compulsory mediation process.
A report, published by Conservative members of the Greater London Authority, claims that strikes have an "immense" impact on the UK economy - and should therefore be "outlawed".
Instead, an impartial judge would decide on a settlement.
More top news
Two 16 year-old teenagers have been jailed for a series of armed robberies involving mopeds in East London.
Labour leader tells May Day rally his party 'stand absolutely against racism in any form'.
Video has emerged of a police car colliding with a cyclist and driving over a bike during a mass bike ride in central London.