Fun as it would be, using TARDIS to re-write history is not permitted. Part of the deal with the Time Lords, along with no profit making activities, enhancement of collections, etc.
We can go back in time & play with the toys, but they must stay in their respective time-space areas. And we must be careful not to change history as it stands, lest we eliminate ourselves from the mix, which would in turn, alter history. A sad Catch-22 if you will.
did Eng.151515 mention something about the Dungeon being awash in "N"Sweat Lager ??