A spokesman for London Fire Brigade has confirmed that the blaze at a chemical processing plant in Greenwich is under control.
Small pockets of flames remain on site and fire fighters will be on site for most of the day to dampen embers.
The spokesman said that smoke over Greenwich has now dispersed and residents no longer need to keep their windows closed.
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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.