International Gilbert and Sullivan Festival Frank Matcham-designed 900-seat Buxton Opera House. Beginning in 2014, the main stage has been the 1,100-seat Royal Hall in Harrogate, another Matcham-designed theatre. These performances are nearly always accompanied by the "National Festival Orchestra". A review of a 2010 performance noted, "The music was up to [the Festival's] usual high standard, with the orchestra (leader, Sally Robinson) ... giving a superb and sprightly reading of the Overture and score throughout." The Festival also hosts dozens of performances and fringe activities in smaller venues. In Buxton, these included the 360-seat Pavilion Arts Centre. In Harrogate, some fringe performances have been held
International Gilbert and Sullivan Festival Production" (for performers under 21) and a "Bus Pass Opera" production (for performers over 60). A "Unifest" competition among university groups is presented simultaneously, as part of the Festival fringe. While the amateur productions compete during weeknights at the Festival, there are weekend professional performances given by companies such as the Carl Rosa Opera Company, Opera della Luna, the New York Gilbert and Sullivan Players, Charles Court Opera, and the Festival's self-produced National Gilbert & Sullivan Opera Company, which has starred such well-known G&S performers as Richard Suart, Simon Butteriss, Bruce Graham, Gillian Knight, Barry Clark, Michael Rayner, Patricia Leonard,