A total of 802 gang offenders are in custody according to the latest data released by the Met. A further 101 gang offenders are subject to ASBOs, gang injunctions or other court orders and 105 have been released from prison with licence conditions.
These restrictions can have a range of conditions, including restricting who gang members can associate with, where they can go and even put restrictions around their use of mobile phones.
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The former London Mayor also claimed Tony Blair's decision to ignore security advice had "killed 52 Londoners".
The victim, a woman in her 40s from Hillingdon, west Londion, was conned into handing over the fortune to a man who faked his name.
Inspectors found a culture of bullying and major problems with poor ambulance response times at the trust, which is the biggest in the UK.