The orchestra is made up of around ten people. Half of these are multi-tasking as they are also actors in the show (often with more than one character). This was incredibly impressive as it really brought the music to life and made it an even more integral part of the show.
Cat Caldwell, 1 October 2015, Pastie Bap
http://pastiebap.com/entertainment/theatre-review-annie-get-your-gun-theatre-at-the-mill/