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The 999 call comes in at 3.11pm.

The woman on the end of the line says she's ringing from a Job Centre in Manchester.

"We have a lady in the reception," she says. "She's shouting and screaming when people are coming in. She's banging on the counter. We've had to close the job centre.

"She's saying she's going to smash the place up... I'm worried she's going to hurt herself."

'Has she got any weapons?" asks Sam, the call handler sat in the control room at GMP headquarters in Newton Heath. "I don't think so," the woman replies. "I haven't seen any."

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Having established the initial details, Sam calmly and methodically begins formulating how the police will respond.

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