The German online nes source quotes a statistic published by UK newspaper The Independent according to which there have been approximately 14,000 people treated for cuts or stabbing wounds in the previous year.
Attempts by the authorities to convince teenagers that it is better to be on the street without a knife in your pocket don't seem to have been enormously successful. The Independent published another statistic that shows that the amount of pupils who have been carrying a knife in the street has gone up from 20% in 2002 to 30% in 2005.
In a further attempt to tackle the problem the police may now search young people even without specific suspicion. Although the Metropolitan Police is reporting a reduction of "knife-crime" by 10.2%, but it may take a while until one will be able, especially as a young teenager, to feel fairly safe on the streets of London again.