London Ambulance Service said:
"We were called today just after 4pm to reports of a roadtraffic collision involving a lorry and cyclist at Camden High Street.
"We sent a number of staff including a single responder in a car, a duty officer, two ambulance crews and London Air Ambulance's medical team in a car to the scene.
Our staff treated one patient, an adult man for a minor head injury. He has been taken to St Mary’s Hospital by ambulance.”
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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.