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In the 60's Blanche had a prang in the woods, this location now carrying the name Blanche's Bump.
The location is between Trwyn-y-Garnedd (above Cei Mawr) and Gysgfa crossing, more precisely coming immediately after Trwyn-y-Garnedd top curve and the informally named "Tro Bocs Cachu", and before Gysgfa curve and crossing.