cameras using the then-new camera technology of a charge-coupled device (CCD). Widescreen was introduced in 1999, using Philips/Thomson LDK 100s. In 2010, the cameras across the site were again upgraded, this time to Sony HSC-300s. In August 2022, it was reported that the BBC was considering selling the studios and leasing them back for production. Buildings "Fairbanks", with its distinctive green-tiled roof, is the oldest surviving building on the site, part of the studios constructed during the 1930s. It sits adjacent to the largest studios, Studio C and D. Neptune House was built during the 1960s, and has a glass-fronted entrance. It has featured in several popular television series, including as the school in Grange Hill, and since 1999, as the hospital reception for Holby City. A purpose-built set was constructed for Grange Hill at the back of the building in 1989, but was dismantled when the series left Elstree in 2002. Neptune House can be seen in the opening titles of Gerry Anderson's science-fiction series UFO (1970) as Harlington-Straker Film Studios, the (literal) cover for the secret and below-ground headquarters of SHADO. The hospital 'wards' in Holby City are actually the top floor of Neptune House, fully kitted out, allowing genuine outside views from the windows. The building's staircases are seen almost constantly in the series. Backlot The exterior set for the fictional East London setting Albert Square in EastEnders is located in the permanent backlot at . Originally constructed in 1984, the set is outdoors and open to the elements; by 2010, it was looking increasingly shabby. It was rebuilt for compliance with the requirements of high-definition television on the same site in 2013–2014, using mostly real brick, with some areas using a new improved plastic brick. Throughout rebuilding filming still took place, and so scaffolding was often seen on screen during the process, with some story lines written to accommodate the rebuilding, such as the Queen Vic fire. In January 2014, the BBC announced on the EastEnders website that the set has been approved to be expanded by twenty percent; creating a new permanent front lot, located on the site of the former staff car park. This expansion project is the 'E20' project, which by 2018 had already gone over-budget. Filming on the front lot commenced in January 2022. Studios Of the seven large studios on site, all are operated by BBC Studioworks. However, only one (Studio