At least 15 people have been arrested after people stopped a large group in London which they believed was set to cause trouble at the Notting Hill Carnival.
Around 34 were halted around 3.45pm at Kings Cross underground station to prevent a "potential breach of the peace," Scotland Yard said.
Revellers at the Notting Hill Carnival this year enjoyed sunshine, music and a heavy police presence. Police arrested more than 200 people.
Hundreds of thousands of revellers will flock to Notting Hill Carnival today.
Europe's biggest street festival has hit the capital with exotic dancers, vibrant music and Caribbean food livening up London.