Bedfordshire Postbox no 3 no longer in use

Out to get my hair cut at lunchtime, then to the farm shop for some dog food.
I knew this postbox was on the run round today, as I approached it the lady of the house adjacent popped her head out the window and advised me not to post a letter as it is no longer in use.
I assured her I just wanted a picture of it :-)
King George V 1910-1936 or thereabouts.