And you obviously didn't pick-up on the point I made in my post, a movement made in this circumstances is made in a controlled manner, which wasn't the case in the thread we are in. Getting out and having a look isn't always practical in a railway environment where other movements are being made. This is where permissive platform working comes in, it is the signallers responsibility to make sure that there is sufficient space for the train being signalled into the occupied platform before the movement is made, then the driver needs to make sure he doesn't hit the stock in the platform and proceed at a safe speed in case of restricted visibility. Stop within the distance you can see, which you'll be familiar with from the Highway Code.