The first time I went to the Warner Brothers Harry Potter Studio Tour was in 2015, just after they had added the Hogwarts Express and Kings Cross set to the tour. At the end of November 2019 we made a return visit, mainly to see how different it was dressed for Christmas and with snow.
The Ministry of Magic always looked huge on the big screen, all done via the clever use of CGI. However they did build some physical sets to complement the virtual ones.