It is not just performers preparing for the carnival
Police hoping to pre-empt trouble at the Notting Hill Carnival have made eight arrests.
Officers carried out drug searches at homes in Battersea, Ealing, Tottenham and Southwark.
They recovered more than 60 rocks of crack and a large quantity of cannabis. The youngest person arrested was 14.
Meanwhile almost 150 letters have been sent to known troublemakers across the capital warning them not to attend the event, held on the August bank holiday.
The arrests began on 17 August when the 14-year-old was arrested on suspicion of supplying class A drugs after a raid in Battersea, south London.
He subsequently appeared at Balham Youth Court and was held in custody.
On 18 August an 18-year-old was charged following the search of an address in Ealing, west London.
The same day two 18-year-olds and another man, 20, were arrested in Southwark for theft and robbery offences.
The following day police searched a home in Lambeth, south London, and arrested a 17-year-old for breaching an ASBO prohibiting him from gang activity.
He was charged and appeared at Camberwell Green Magistrates' Court.
Det Ch Insp Helen Millichap said: "This operation is all about deterring those intending to go and cause trouble.
"We're asking anyone who may know someone intending to cause trouble to get in touch."