‘I fell asleep on a soundsystem!’ – the pyramid-building artists invading Notting Hill carnival

At this year’s city-shaking, weekend-long bash, a triangular pavilion will be appearing amid the floats and dancers. Revellers can sneak inside for a rest – or climb on top and partyAlvaro Barrington is recalling his first ever festival experience in Grenada: “I was maybe five years old and my cousins took me to J’ouvert,” he says, referring to the day that acts as a precursor to the main party in Caribbean culture. “I have a memory of one of my older cousins