I’m pretty sure this is the first Nick Payne play we saw. I remember little about it, other than the fact that the play was pretty full on about sex and that, despite its unsubtleties, we came away with the impression that we wanted to see more of this writer, which indeed we did.
Here is a link to the Royal Court resource on the play/production.
The usual praise for the Royal Court’s production qualities whether upstairs or downstairs. Super cast too.
Here is a search term that will find you the reviews and stuff if you want a deeper dive.