One and a half hours of last night's rehearsal spent on character development work.

It seemed like an extraordinary indulgence. I sat there, slightly fidgety, thinking 'we could be rehearsing. We could be walking about' but equally, this is - increasingly revealing itself to be - a really useful exercise'.

And did their performances reveal a deeper than ever emotional intensity when we finally did get down to business and they started walking about aka acting..?

We shall see.