High Quality Content by WIKIPEDIA articles! Cineworld Group plc is a cinema chain operating in the United Kingdom, Ireland and Jersey. The chain consists of 81 cinemas, 79 of which are located in the UK, with one in each of Ireland and Jersey. It is the second-largest cinema operator in the UK with over 800 screens, and the owner of the single largest multiplex by screens and customer base in Ireland.Cineworld Glasgow Renfrew Street is the tallest cinema in the world and the busiest, by customer base, in the UK. The Cineworld with the greatest number of screens is that located at Valley Centertainment in Sheffield, which has 20.