In its Victorian heyday, visitors marvelled at 'the Ark in the park'. By 1991, however, London Zoo was in trouble. With government subsidies ended, the loss-making institution had one year to balance its books or face extinction. In came the moneymen and out went 1300 animals - a third of the zoo's collection - and 26 keepers. In too came Molly Dineen, director/producer/photographer of The Ark, the BBC's four-part series about those troubled twelve months.