Tardis Cake

I baked a very simple sponge with cocoa powder in. Can't find the recipe though unfortunately! I cooked it in a bread load tin, left it to cool before putting it in the fridge for a few hours, then I cut it in half with a bread knife.
I covered one side with a generous amount of home redcurrant and blackcurrant jam - yum!
After sandwiching them back together, I covered it completely with buttercream icing with blue food paste.
To get the outline of the door, I rolled out some icing to the right size and shape and then cut out the squares. Ideally I would have done this with a craft knife but didn't have a suitable one so used a knife instead.
I put the door outline on the cake and then covered it lightly with some more of the buttercream to blend it in a bit.
I used the cut out squares from the outline to make the window details. I just drew the design on with an edible pen, most of the writing was scribbled, then I slotted them back in where they were cut out which was nice and simple. I used tiny bits to do the handles as well.
I made the little lamp on top from icing, glued it on with the buttercream and put a bit more on top to get the right colour. I then cut out a small thin strip of the rolled icing and drew out the outline of the letters, filling in the rest so only they were left. And that's it!