No I didn't, the first occasion I was outside the shop while I saw her being served at the counter, I tend to avoid her anyway but especially without a mask on. Staff didn't say anything to her either.
I'm not a confrontational person anyway, she wasn't in my personal space so I didn't feel the need to approach her on my own behalf. I think it should have been a staff members prerogative to say it to her not mine. I can still be disgusted by her behaviour and by all accounts she is viscious and self absorbed so it wouldn't make a difference regardless if I had approached her, maybe only that I'd get attacked. And she would continue on not wearing a mask and not caring about other people regardless.