Get out of it, you pommies ... this is about RAAF circuits, and therefore any reference to 'runs and breaks' should be deleted, and replaced with 'initials and pitches'.
For the original poster, after the pitch (early downwind) the gear and maybe a stage of flap go out, so a reasonable power increase from idle is required to maintain downwind speed. Not that I was a knuck, but I did train on a jet some time ago, albeit a little one.