If your going to go time traveling on an HO scale train layout. Your going to need the right piece of equipment. TT Type 40, Mark 1 (Time and Relative Dimension in Space) TARDIS. Because it just looks like such fun. It only comes in Blue.
These also work great for standard English Police Call Boxes that are, or were all over London and England. I think.
Yes I am only ever going to have this open in Polished Royal Blue - Strong & Flexible material. 1, that is all either of these 2 boxes came in. 2, Not going to make it easy for copy casters to steal this design. Also your going to need a small blue police light from old ROCO or Herpa to finish this off right.