Must be new rules.
When I controlled there (on 2 separate postings) only ever remember holding VFR guys in the lane when doing GCA's onto RWY 30.
And if I remember from when I scanned your book Dick - you said in the text that the only place you ever got held was departing Darwin on the same trip.
Do you change the story to suit your argument?
(PS - I flicked the book...never actually bought it.......)