Also, The Sensorites is one of the occasional early stories when they do a 'flow through' - the camera follows them out of the doors, and then (after a really clever cut) the policebox is there where the TARDIS interior seemed to be. That might have an effect on the camera blocking.
IIRC, Web Planet is another with an exit to the right... which is also a story where we see the lab alcove that's on the side of the console room that the cameras usually look through.