Maybe you are just a wee bit too young ? The lady was a 'sort of' actress and was in the St Trinians films. She was quite famous for a couple of things which is why that Triumph works Le Mans engine was named after her.
Have to confess I sought info on the engine not the pic and the engine was nicknamed Sabrina. After Norma Anne Sykes who was very much out front and they thought the cam covers actually beared some similaritues to her assets She was on here not so long ago she was known as Britain's answer to Maryln Monroe. FYI. She died a recluse in LA.