From the same Guardian article:

"The policing minister, Nick Hurd, said that crime, as measured by the crime survey, was down by a third since 2010 and by 69% since its 1995 peak."

From the BBC article:

Martin Hewitt, assistant commissioner responsible for territorial policing, said: "Similar to the rest of England and Wales, crime rates in London are rising, but many of these are still at a much lower level than five years ago and are against the backdrop of significant reductions in resources.