What's on Open Days Summer Open Days 2017: Hertfordshire Whether you're thinking about becoming a member of one of our choirs, or you're a parent or guardian, or a music or singing teacher interested to know more about what we do, you're welcome to come and find out more at our Hertfordshire Summer Open Day 2017, held at the Royal Masonic School for Girls. The choir at RMSG will be our National Youth Choir, our flagship ensemble of around 100 of the best mixed voices in the UK, aged from school year 12 to age 22. They'll be rehearsing for a concert at Trinity College, Cambridge on Friday 25 August, which you may also like to attend. You'll be welcomed by the Course Director and given your own musical session as a group before being taken round the course to observe rehearsals and other sessions. It's up to you to make your way to the Open Day, and children must be brought and accompanied by adults. We'll make sure you get refreshments on arrival, but we kindly ask you to make your own arrangements for lunch. Booking for this event has now closed.