That, I think, was earlier. Brighton came up the season after us and we went there in Sep 79 and a few went up the pylon. After that they had it barbed-wired and you couldn't climb it.
In this game, or the season after, does anyone remember the lone Saints fan in a sheepskin coat, turning up in the home end just after half time, starting a ruck and no Brighton fan going close to him. Eventually the OB got him out, to a huge ovation from us.