scampsweep said: "In London, the alternate schedule varied (or at least the rumours about it did) - so it was difficult to know when Eva was performing most of the time. It was like there was a schedule, but they didn't always stick to it, I don't think. I saw Eva in London and thought she was good. You should be fine if you go to a Friday or Saturday evening performance, though. Hope you enjoy it.
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It was never announced as a schedule per se, and that was the line of the producers that there isn't a set schedule but there was. I was easily able to see whichever Kim I wanted whenever I wanted, and was able to see the second understudy go on if the alternate was on holiday. I believe the alternate in London went on Thursday evenings and Saturday matinees. I don't recall right now, but it remained the same schedule for the entire run.