A concertina masterclass taking place on Zoom. Four performer places are available for players to perform and receive comments and feedback from Rob; general audience tickets are on sale too. Performers will have approx 30 mins each to perform their piece, receive comments and feedback on it, ask any question relating to it and discuss any points arising etc. Zoom meeting opens at 1545 GMT; performers will need to have Original Sound enabled - see https://support.zoom.us/hc/en-us/articles/115003279466-Configuring-audio-for-music-and-singing