Complex sentence: The Majestic, later the Gaumont, Clapham, had 1,562 seats and provision for an orchestra as well as a small organ, later replaced with a 3-manual Compton.
Split into simpler sentences: The Majestic, later the Gaumont, Clapham. This had 1,562 seats and provision for an orchestra as well as a small organ, later replaced with a 3-manual Compton.