We had a brief panic this week concerning a forthcoming Cathedral Chamber Choir booking. A member of the choir heard that another choir she sang in was going to the same place at the same time! I have checked with the cathedral concerned and we are definitely booked in there and not the other lot.
It was as well to check, because double bookings of visiting choirs are surprisingly common. I think cathedrals are now more organised than they used to be about the admin related to this, but it still can be seen as a chore which is passed to someone relatively junior, such as a gap-year organ scholar. By the time the actual event approaches a couple of years later, that organ scholar has long since moved on – and a different organ scholar who hasn’t dealt with either choir before has to sort out the mess.
(I should stress that the cathedral I referred to above doesn’t deal with visiting choirs this way!)