Glenda Jackson told members in the Commons she believed Thatcherism brought the "most heinous social, economic and spiritual damage upon this country, upon my constituency and my constituents."
Some responded to her criticism with shouts of "sit down".
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Police carried out a "proactive" operation after receiving reports that other concerts by the band had seen lots of mobile phone thefts.
The child died on her injuries and another 14-year-old girl was injured after the buggy they were travelling in was involved in a car crash.
Cloud thickening from the west throughout the day. Rain in northwest later.