TARDIS 1 (The Timeless Children)

A TARDIS was present on Gallifrey following 's planetary devastation.

As the Thirteenth Doctor prepared to detonate the death particle to stop the Master and his army, she led her human friends to this TARDIS which she programmed to send them to Earth in the 21st century. The Doctor intended to sacrifice herself to save the universe from the Master while using the TARDIS to get everyone else to safety. However, Ko Sharmus followed her out to sacrifice himself instead to finish the job his resistance group had started when they had ended the Cybermen.

Upon materialising on Earth, the TARDIS' chameleon circuit caused it to take the form of a house. The Doctor's friends emerged and were left believing that the Doctor had perished, unaware that she had instead escaped Gallifrey in another TARDIS. (TV: The Timeless Children)

Yasmin Khan used to sleep there while thinking about using it to find the Doctor, when the Doctor called the Death Squad Daleks to exterminate the Defence drones, she used this TARDIS to lure the Daleks into a trap by using the chameleon circuit to make it look like her own TARDIS, and programmd it to fold in on itself, sending it and the Daleks inside of it to the heart of the Void to be destroyed with them. (TV: Revolution of the Daleks)

Behind the scenes

 * Despite TARDISes having a different style Classic interior in past stories, this TARDIS' interior, along with another one, used the same style of interior as the TARDIS used by Jo Martin's Ruth Doctor.
 * Although it is never explicitly stated that these were the original interiors, just that they were different TARDISes from the Doctor's own version.