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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Officers were given the touching letter at Brixton Station while they were on a reassurance patrol after yesterday's attack
The 52-year-old had previous convictions for violence but was not on the anti-terror watchlist.
In a statement Charlton Athletic said: Keith was a true hero who will be greatly missed by all the Charlton family and everyone at the club.