Writing in the Observer the Mayor of Liverpool Joe Anderson joined the leaders of Newcastle and Sheffield's councils to call on the government to stop their programme of austerity.
The dire economic consequences of the government's austerity programme are now being suffered by millions of families.
We urge them to stop what they are doing now and listen to our warnings before the forces of social unrest start to smoulder.
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Greater Manchester Police said "inquiries are ongoing to fully understand the circumstances of the incident."
Business Secretary Greg Clark said talks with Peugeot's boss over a potential Vauxhall takeover were both "constructive and reassuring".
He served in Margaret Thatcher's Cabinet as Home Secretary in 1989 and was also a former Governor of Bermuda.