[spoilers] Departure of Grid Members?

[loladom]

I believe Olga left of her own accord due to being pregnant as did NW in S5. I'm sure I recall David saying in an interview he'd chosen to go, he had something else in the pipeline, can't remember what. Shauna just disappeared didn't she, she wasn't even given an exit other than some mention about being devastated. The others, I don't know. That's the nature of show biz I suppose!