Shortage of police caused summer riots to spread
2 July 2012 Last updated at 09:10 BST
Front-line police officers caught up in last summer's riots in England have suggested the trouble may have spread because the Metropolitan Police were too slow to ask for help.
Officers were questioned for the London School of Economics and The Guardian and many said they fear similar riots could happen again.
Ben Ando reports.
Watch the full report on Newsnight at 10.30pm on BBC Two on Monday 2 July 2012 then afterwards on the BBC iPlayer and Newsnight website.