Something I noticed when I was looking at the picture was that the first three busses are in order of the fleet number, the other fleet numbers are ill-legible from the photo.
(https://www.actbus.net/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FIxB8RfU.jpg&hash=bd759d802e36af22c59ed3fb3aa1300abb10ea78)
I think they're 894, 959, 903 and 909