While Game of Thrones was headquartered in Northern Island, prequel House of the Dragon will film in England

Entertainment Weekly

The HBO prequel series will film at Leavesden Studios in Watford, north of London, which is currently where The Batman is filming. "One major advantage to the new location is the weather," says EW's James Hibberd. "While England isn't often praised for its climate, Thrones typically filmed in the winter months, and its cast and crew frequently battled Northern Ireland's weather system. Many iconic battles (like the Battle of the Blackwater and the Battle of Castle Black) were shot in freezing rain, even though the downpour often wasn't noticed by viewers (such as during 'Hardhome'). By comparison, the London area is, on average, notably warmer, drier, and sunnier."