Wildcard said: "This show was the one broadcast on the radio on BBC. However, I suppose the 25th anniversary gala wasn't the only performance they filmed since some of the close-up shots are similar to the cinematic trailer they had before"
They had 4 camera's filming the 25th anniversary show (complete show + celebrations at the end) in September 2014.
However, in the final week of performances, february 2016, they did 3 days of additional shots and close-ups. They did this during the day, without audiences. They asked Alistair Brammer and Rachelle ann Go back for these close-up shots, who had already left the show for a year. (Rachelle was already in Les Mis) The actor and actress who played Thuy and Ellen were not asked back for additional shots so all of their shots will be taken on the actual 25th gala show day.
I wonder if they can still match the shots and intensity of those 25th show footage with the shots of 1,5 year later, where everyone looks 1,5 year older, and some of them have been out of the show for so long (haircut, weight, etc).
Also, they did not use an orchestra whatsoever for those close-ups, so I assume they will use most video footage of the 25th show but ALL audio. I think they lip-synched to themselves on the additional shooting days.
In the trailer, most of it looks like the new closeup material. I hope they keep a lot of the actual performance in it too. I also hope they enhanced the audio a bit, because Eva skipped some high notes/sung wrong melody lines here and there and it would be a shame if that ends up on a document like this.
I wonder if the blu ray listed on Amazon.co.uk will be region free. If so I'll pre-order it right away as it is not currently listed on Amazon.com. 
