Councillors said they were concerned by the loss of green belt land. However, the 15ha site has since been redefined as grey belt land following the introduction of the new land class in last year’s update to the National Planning Policy Framework. Grey belt land is defined as areas of the green belt which do not strongly contribute to key green belt purposes, including the prevention of urban sprawl, and has less restrictions on development. His 110-page letter said Reed agreed with the conclusion of Sky, Hertsmere council and Green Fields not Grey Studios - a campaign group set up to fight the proposals - that the site comprises grey belt land. The existing studio’s 14 sound studios have previously hosted production teams working on Wicked, starring Ariana Grande, and Paddington in Peru.