A trap can only be removed from the Spring Traps Approval Order if a new order is issued or a 'variation' is issued (i.e. that modifies the current order).
Maybe I'm missing something but are you sure the 120 -2 ever been on the stao? It certainly isn't on the 1975 one, the 1995 one or the 2012 one that replaced it (or on any of the intervening 'variations' from 1982, 1988, 2007, 2008 or 2009). The Scottish and NI instruments just essentially mimic the English ones (although Scotland dropped the Aldritch on the last update) and as far as I know none list a 120. Here's a list of all the rel