sentences:  The first computerised booking system was installed in February 1983.In 1990, the hall briefly closed as part of a £500,000 modernisation programme to rewire the building and improve the technical facilities, as well as redecorating the backstage area.In 1999, removable seats were installed in the front of the stalls, in response to rock concerts where fans at the front wanted to move around freely, as well as increasing capacity.