Police have arrested more than 30 people in a series of dawn raids ahead of Notting Hill Carnival.
Nine addresses in Lewisham, south-east London, were searched and 13 arrests made early on Tuesday morning in a planned, intelligence-led operation.
A number of raids were also carried out in Kensington and Chelsea, the borough where the world-famous carnival takes place every August bank holiday weekend.
Officers searched 21 homes in Kensington and Chelsea, Hammersmith and Fulham, Westminster, and Wandsworth, arresting 18 people.
The crackdown - against knife crime, drugs and child exploitation - was carried out by more than 100 officers from the Metropolitan Police, City of London Police and the British Transport Police.
Since Friday August 11, and not including Tuesday's raids, officers have made more than 290 arrests for a range of offences, recovering 190 knives and 18 firearms.
Tuesday's arrests were predominantly for possession with intent to supply drugs.
Officers known as "super recognisers" will be in the area and monitoring CCTV to help spot those banned from the parade.