More than a million of extra police officers will be deployed in London and elsewhere . Officers will carry out checks for weapons as people enter the area , he said in a prepared statement . Thousands people are expected to attend the Three weeks ago Notting Hill Carnival . Police say intelligence indicates some gangs are planning to cause trouble . two-day , London was hit by outbreaks of rioting and looting .
More than a million of extra police officers will be deployed in London and elsewhere . Thousands people are expected to attend the Three weeks ago Notting Hill Carnival . Police say intelligence indicates some gangs are planning to cause trouble . two-day , London was hit by outbreaks of rioting and looting .