Five men will appear in court today charged in connection with a smash and grab raid on Selfridges in June.
Jewellery and watches were stolen from the Oxford Street store.
Today's hearing comes after officers carried out dawn raids on eight addresses in Islington yesterday.
The arrests are also linked to a robbery in Berkshire in April.
More top news
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.