As I mentioned earlier, Sarah Lancashire hardly opens her mouth when she speaks and I wonder if that is one of the reasons I don't always catch what she says.
When I was growing up, my Mum was slightly hard of hearing, but I found that as long as she could see my mouth and I mouthed my words (not overly) she knew what I was saying.
If anyone speaks like a ventriloquist, I've no chance of knowing what they are saying.
Goodness knows how anyone from other countries can understand her.
Not that that puts me off, I still love her as an actress and will watch anything she appears in, but I'm glad I can put the subtitles on.:-)