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On the sign:
THIS IS WHERE PRINCESS DIANA DIED IN A CAR CRASH DOWN THE TUNNEL ON AUGUST 31 1997
The commemorative corner was established by fans of Princess Diana, at the foot of the replica of the torch Click for sign's details, near the place where she was killed in a car accident in 1997.
The corner (or the torch), is also used as a place for "Love padlocks" as you can see in one of the following pictures.