The loud hailer is show at the top left of the picture and would have been used to broadcast a very load message in the event of the train being robbed. Note that the fitting has already been removed from this area for restoration. The load hailer will not be restored since the vehicle is being returned to its original condition, this also means that the electric train heating seen on the ceiling will not be reinstated.
One of the stools to be found attached to the benches. TPO staff tended not to use these, finding it easier to stand while sorting.
One of the holders that would be used to hang string from for tying the mail up with. Note the missing light switch above it. These are located just inside the registered fittings.