That rings true. Trouble was, BOAC always allocated us BUA/BCAL chappies the graveyard slots: something like 0200 - 0600. Definitely a challenge to land the camera on the runway after breaking off an indifferently-tracked NDB approach at that hour... As for visual circuits, forget it.
Some of our older line captains were quite paranoid about it, which was a bit of a shame really.