More from our Political Correspondent Simon Harris, who is at a meeting of the London Legacy Development Corporation.
Boris Johnson tells board the park re-opening has "got to go off with a massive bang". @londontonight
LLDC is considering a QEOP membership scheme with loyalty cards allowing venue users to make priority bookings. @londontonight
More top news
Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.
The family of Oliver Dearlove urged people to "think again" before using their fists, as the man who killed him began a six-year jail term.
London Fire Brigade took Southwark Council to court on four charges in relation to safety breaches at Lakanal House in Camberwell.