But according to Mr. Hinton the complete performance lasted rather longer than seven hours, so we shall see what happens - perhaps it will be split between the two days.
The link is still working at present; not being able to spend the whole night up, I listened to it starting this morning. The seven hours of music begins with the beginning and ends with the final fugue, so it does not appear to have been broken up. Maybe the original performance had breaks which took it over seven hours.
Anyway, fantastic to be able to hear this piece at last. Ironically, I would say it is one of Sorabji's more accessible pieces, given that the familiarity of the Dies Irae chant makes it all easier to follow.
Strange piece of synchronicity: last night my wife was chatting to some internet friends, and jokingly claimed she was setting her phone ringtone to Sorabji's Sequentia Cyclica. She had no idea that the first broadcast of it was about to start within minutes!