Odiham had three, one which was the map store was the original and to small, the later one which I think had the met office in it when I was there was closed and a new one built over at RAF Long Sutton after an accident on the OCU site when two helicopters collided, the tower had cleared it to take off but with the layout of the airfield meant they could not see the apron, so the "new" tower was built that could see all the aprons.