Untold Stories was considered by the panel.
Didn't play 30 perfs, even across the Royal Court and Duchess
The St James is eligible so Scenes from a Marriage would've been considered.
The Olivier Panel (9 public plus 5 industry professionals) and the 100+ voters I think. I believe SOLT members vote on the nominations (from a longlist drawn up by the panel) as well as on the winners. But they keep changing things around, so it may be different this year.