Notorious robber Sean Bradish has been given two life sentences for armed raids committed while he was on day release from prison.
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The three-week trial is designed to speed-up the flow of passengers leaving Holborn station during the morning rush hour.
Tube managers unveiled plans last night to hire a new workforce of part-time drivers in a bid to rescue the 24-hour service.
Masked machete-wielding raiders stormed into a convenience store and threatened the assistant, before stealing cash, cigarettes and alcohol.