Darrin posted Well, you asked for it.
Robert is very much a trail blazer for the "positive only" movement and relies a good deal on clicker. Nothing wrong with that, but it's more of a philosophical change in approach than I think Hugh may be looking for, and it needs some study, not least in the correct use of clicker which is a skill no easier to acquire than correct use of the collar. I'd be quite happy to follow Robert, but then I've travelled the road before; even so I use some aversives as and when.
Wildrose is distinctly weak on the basic OB tasks, (having said that so IMO are some of the collar based schemes, notably Strawsky) but the rest of it is pretty good, quite inventive, and includes a sort of FF Lite without the collar. Mind where you step with the marketing shoite.
Some years ago I was an overseas member of The American Hunting Dog Club; their publication "Training the Sporting Dog" is an excellent, comprehensive work, very strong on reviewing the progress of both dog
and handler, so it might well suit Hugh's needs. Non collar (and quite keen not to be,) FF is shown via ear pinch, and obviously the whole thing is directed at US style hunting. The chapter on dog aggression is .... well, a chapter on dog aggression
Vic Barlow's book and Martin Deeley's are useful; Deeley's the better of the two.
Upton is not recommended.
You'd probably get the lot for $120, but if I was doing the job barebones, I'd go AHDC
and Wildrose, deciding as I go along if FF is needed for that particular dog. The Lardy flow chart is nice to have alongside and has the inestimable virtue of being free and fer nuffink.