Remembrance of the Daleks - S25-E1
Continuity mistake: After the Special Weapons Dalek blows up the gate to Ratcliffe's warehouse, you can see that some of The Daleks were slightly damaged by the explosion. In all the following shots, they have been repaired.
Continuity mistake: In the scenes set in the underground tunnels in Part Three, the Kandy Man has no metal brace around his mouth, but he does have the brace in other scenes.
Remembrance of the Daleks - S25-E1
Continuity mistake: When the Doctor and Ace steal the military van they leave the doors open, but in the next shot when we see the van leaving Totters Lane the doors are suddenly closed.
Answer: TARDISes are generally available for properly authorised use on Gallifrey; they're not usually assigned to a particular Timelord on a long-term basis. The Doctor stole his when he left his homeworld.
Tailkinker ★