Thanks for further info folks.
Vilas, I tend to agree with you about the 25kt increment - that it is a manoeuvre area limitation at design phase, but not meant to be considered for actual operation, where the ACTUAL wind should be adjusted for. BuzzBox says the same.
By the way I found that PowerPoint Presentation of Capt.Foo's - located here:
https://www.scribd.com/doc/45970594/...cling-Approach
You can download it by right clicking on the first slide and selecting 'Save Page As'.
Its very useful and a good read.
BuzzBox, Regarding the 50ft increment - I agree with your comments, but I'm still a bit dubious on how to conduct that level off. If still in IMC at (say) 800ft in an approach with Circling Minima of 700ft you would need to start the level-off in order not to bust minima. But is that really acceptable if still IMC? Isn't a GA in fact necessary by then?