With just 50 days to go until the start of the Olympics, Transport bosses are insisting the network will be able meet demand during the Games.
This morning, four tube lines were either suspended or delayed including the Central line which has been flooded by a burst water main.
The knock on effect was chaos for hundreds of thousands of commuters and increased fears the tube will be unable to cope this summer.
Toby Sadler reports.
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Thousands of passengers now face delays, with Southeastern trains warning "all services" would be affected.
Paramedics attended a scene in Willesden, north-west London, on Monday afternoon where they found the teenager with stab wounds.
At least five people have suffered minor injuries but the cause of the blast is still unknown.