When Gloria plays her solo from the Concierto de Aranjuez, none of the band members have had time to find their music and put it on the stand after the end of The Floral Dance.
When Phil is punched by the bailiff, he is punched on the left side of his face. Thereafter, he appears with healing wounds on the right side.
When the bandsmen board the coach for the village contest they are all carrying their instruments which they play to "tune up" on the coach. When a band plays "away from home", all instruments are placed in their cases in the luggage compartment of the coach for safety.
When the brass band leave on the two coaches to the Albert Hall for the finals they are wearing blue suit jackets. When they arrive in London and have a group photo outside the Albert Hall they are wearing purple jackets.
The result of the vote for redundancy seems to take place on a Saturday, when the regional final for the brass band is also held. Some miners are shown leaving their shift. Saturday work had been eliminated from the National Coal Board long before the film is set. An announcement as important as a redundancy vote would not have been made on a Saturday.
Cameraman is reflected in the horn of the trombone in the tracking/dolly shot during The Floral Dance.
When Gloria is playing the Concerto de Aranjuez, the second measure after the Flugelhorn comes in, she plays a note with the second valve that should be played with the first valve. The written note is a B-flat for Flugelhorn (concert A-Flat). Playing with the second valve would produce a B natural, a half step higher.