>>> Wasn’t she in Caligula (which, as I understand it, was a movie in which unsimulated sex acts occurred)?
Yes but not with her. The producer brought in professional porn actors for more authentic Roman orgy scenes. The “name” actors such as Helen, John Gielgud and Peter O’Toole didn’t sign up for that. I don’t recall Helen’s particular response to that but I do know some of the regular cast were angered they had been tricked into a semi-porno movie. However the editing was beyond their control.
>>> Any pics of her 50 years ago?
The earliest movie I became aware of Helen was as Arthur’s evil sister Morgana in “Excalibur”. Quite a lovely lady.
Same with me, I loved her in that!