According to the Department for Work and Pensionsif you're a couple with two children you are living in poverty if, afterhousing costs, you have £357 a week.
If you're a couple without children, that figure is £220 a week.
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Police arrived at the 73-year-old's home after Alfie chased a delivery man.
Officers believe the three assaults are linked and are appealing for information about the suspect.
Nine addresses in Lewisham were searched and 13 arrests made early on Tuesday morning in a planned, intelligence-led operation.