The new knife crime figures show that across England and Wales there were 22,151 serious violent crimes involving a knife or sharp instrument - one fifth of serious violent crime. They included 231 attempted murders, nearly 14,000 robberies and more than 8,000 woundings. Londoners are more at risk of attack than anyone else in the country with 230 residents out of every 10,000 becoming a victim last year, compared with a national average of 179.