NEW DEER . O.S. grid ref. Incorrect.
BUT, it is a 1968 closed post, bunker seems to be completely gone, old ORLIT post stands further up the road no sign of Bunker.
Update 02/2003... post completely destroyed, orlit post demolished, the place has been levelled and is now up for sale, the pic below shows the site of  the underground post the grey rubble being the remains of the top half of it piled into the hole..