"The Royal College of Nurses sadly I don't think speak for their members because the picture they paint is not the picture that I see of the NHS. It is under pressure but actually the number of clinical staff throughout the NHS has gone up."
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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.