I have found a bug that is quite breaking the bug allows you to travel as far as you want in the Tardis without using any fuel and near instantaneously,
so you start by either selecting a location or in putting coordinates then set the throttle to on while the Tardis is dematerialising set the throttle off after the low fuel sound plays set the throttle on again let the Tardis land as normal and you have travelled as far as you want
this sometimes leaves a copy of your Tardis in the place that you just left so if you travel back the the same spot you land on top of it and you can watch it dematerialise but this leaves a ghost block in its place and you have to go in creative to remove it