Here are the links provided by Penny Homer via comments left on this post:
First, about the event at the Opera House
Second, a review from the FT
Thirdly, information about Jonathan Dove, composer for Diana & Actaeon
I wasn't able to attend the big screen event in Trafalgar Square this evening, though everyone enjoyed it!
*** end up update
12th July 2012
The Death of Actaeon about 1559-75