London Underground bosses were red faced when tube passengers were stuck in a tunnel for two hours.
Underground controllers did not realise the passengers were there when the Central Line was suspended due to a signal failure.
Some passengers were in the train for more than 1 . 5 hours.
The government have criticised the London Mayor over the rising costs of upgrading the London Underground .
The mayor is asking the government for the sum of £400 million.
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