The Queen and The Duke of Edinburgh will attend the Royal British Legion Festival of Remembrance today.
The annual festival held at the Royal Albert Hall commemorates and honours all those who have lost their lives in conflicts.
This year the following acts will perform:
Rod Stewart, Alexandra Burke, Russell Watson and the Military Wives Choir.
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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.