The playing continues. The listening continues. The music continues.
Some musicians have other commitments on the night.
Some musicians drop out completely, others join afresh. Some are just in London for an extended stay. The composition of the Orchestra over the months is as determinable as the music performed. The most important trend over the last couple of years has been how the music gets more and more together. In spite of all the comings and goings, the orchestra gets tighter, so that it has become an even more coherent improvising unit.