Accident M25/speed limits

another accident today on the M25 near clackett lane services,when i got there i was not surprised to see another european driver had side swiped a car,could not say who was to blame,could very easily have been the car driver doing something stupid,then it could have been the hgv,on another note,dont know if its just me but has any other driver noticed that no one takes any notice of speed limits now when there is an incident,flashing up today 26 6 14 was 50MPH people were still doing about 60 in cars,lorries were not slowing either [inc me] and as usual nothing there when the END sign flashed up,now i look well ahead for brake lights to know something is up,anyone else