I just listened to Narain in the BBC post race and he told David what really happened.
Button incident he just felt a bump, he even said sorry to be in the way of a championship contender but he also acknowledged he made no mistake as they were on the same lap and it really was Button´s fault.
But more interestingly the Vettel incident was a bit more clear now.
He hit the white line/curb and went over marbles as he was accelerating so the car pivoted slightly to the right and Vettel had just not managed to clear him completely, hence the contact.
Button incident he just felt a bump, he even said sorry to be in the way of a championship contender but he also acknowledged he made no mistake as they were on the same lap and it really was Button´s fault.
But more interestingly the Vettel incident was a bit more clear now.
He hit the white line/curb and went over marbles as he was accelerating so the car pivoted slightly to the right and Vettel had just not managed to clear him completely, hence the contact.