Reported crime at this year's Notting Hill Carnival is "significantly down" on last year's event, police said.
Chief Superintendent Michael Johnson said: "Early indications from yesterday are that crime is significantly down on last year, but we never like to put that out in the public domain without knowing exactly what those figures are.
"It is very difficult because some people won't report it (crime) until they get home."
Arrests are at about the same level as last year, with 85 today as of 6pm - including 44 for drugs-related offences.
Scotland Yard said there were just under 100 arrests yesterday.
More top news
People are being encouraged to post pictures of themselves sleeping in "weird" places in a bid to raise money to tackle homelessness.
A British military ship carrying supplies and off road vehicles has arrived in Ebola-hit Sierra Leone
Sam Burgess is ready to show what he can do in rugby union following his code switch, after defending his decision to leave league