On October 9 a Doctor Who film crew returned to Cardiff for more filming with Bradley Walsh, Mandip Gill and Tosin Cole. The scene filmed was of the Doctor’s companions confronted by people in suits with guns. The filming took place just outside the car park for Capital Quarter, an office complex adjacent to the previous week’s filming location near Lumis Student Living in Cardiff. With only a few weeks left of principal photography in 2019, the filming is believed to be for a 2020 Christmas special, according to the CV of the director, Lee Haven-Jones.
Mandip Gill and Jodie Whittaker enjoyed themselves at the fancy dress wrap party October 25 (a little early, as filming continued through October 31) as Frida Kahlo and Sia. Go here and scroll down to see the photo – https://cultbox.co.uk/news/doctor-who-series-12-fancy-dress-wrap-party
There were several Doctor Who night shoots in Cardiff on October 29 up until 4:00 a.m. on October 30. Part of the filming occurred inside Cardiff Castle, where main cast cars and some Dalek props were spotted going inside. One of the other night shoots occurred on the corner of Wharton and St Mary Streets in Cardiff with a crowd of extras. Approximately 20 extras were filmed looking frightened as they spied something above them, then ran down the street toward some explosions. More filming apparently occurred at Maindy Barracks, a military installation in the Cathays district of Cardiff, on October 30. Principal photography wrapped for night shoots in several locations in Cardiff the evening of October 30 into the early morning hours of October 31. The crew then spent some time filming establishing shots of buildings in Cardiff before wrapping up for the night.
If you didn’t see enough photos of the Dalek shoot on Clifton bridge in the Gallifrey Guardian, check out this page: https://cultbox.co.uk/news/doctor-who-series-12-filming-with-new-dalek-design-in-bristol