Westinghouse: The BA Winglet was sliced through by the leading edge of the Airbus wing, it looks to be just inside the tip. ( maybe 1 foot )
One would hope that the leading edge of the Airbus wing, being made of Aluminum, would be a little stronger than the Composite Boeing Winglet!!
The Airbus Winglet was not involved, it rode over the top of the BA wing.
Look at the photo again and you can see bent metal at the front of the Airbus wing.