It's been revealed that a teenager who was stabbed on a bus in north London on Tuesday had been celebrating his 16th birthday.
Derek Boateng was fatally injured in the attack at Highbury New Park.
A 15-year-old boy has been arrested on suspicion of murder and remains in custody at a north London police station.
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Inspectors found a culture of bullying and major problems with poor ambulance response times at the trust, which is the biggest in the UK.
More than a tenth of the Piccadilly Line train fleet is out of action because of emergency repairs to damaged wheels.
Rows of students stood and turned their backs before filing out of the lecture theatre.