Gertrude said:
"Because ATC ask you to" would be another reason
Wash your mouth out with soap sir, I do what ATC asks me to ONLY when it co-incides with my own interests. Otherwise I will politely discuss with them a more appropriate course of action!
Thief mentioned that:
, the magazine also said that many time, you just hold a continuous bank angle throughout the manuever
Disregarding the strange colonial spelling of manoeuvre, what you're describing seems to be a "constant aspect approach", which is something else altogether. In both the UK and the US it is routinely practiced by the military, and by glider pilots - you'll also find it taught in some places as a way of flying PFLs.
The principle is fairly straightforward in it's application, you keep the landing point (nominally about 1/3 into your runway or field) at the same angle below the horizon through a constant descending turn. You can vary your bank angle for positioning, and the intention is to roll out wings level on your landing heading at 100ft or so. It has two big advantages, one is for mixed circuit traffic that it allows aircraft with very different speeds to share a circuit quite painlessly, the other is that it takes much of the guesswork out of whether you'll correctly you'll judge your landing point if the engine isn't playing.
Looking at my records I did write an 1100 word article in one of the American flying magazines (not on the one mentioned) on how to fly CA approaches, it was published in April 2001. If there's any interest, and given a couple of days I could probably post it in here.
G