To the rider involved in an accident outside C4 this morning

ok .. IMO if you hit a pedestrian, you are generally at fault. if a ped steps out behind a car and you crash into them, you either weren't covering the brakes well enough, or you had crappy brakes, or you are a bad rider and need to improve/improve your reflexes, or you were riding too close to left, reducing your maneuvering room...

plus one to lpg here.

even if the peds is completely at fault, there should be enough time, room and braking distance between you and the peds.

Those kind of incident are easily avoided, drivers managed that well in Oxford Street (for example).