Funny how people always quote the POH when it agrees with their way of doing something. Presumably POHs must say that only full flap can be used for landing.
As for increasing speed on the approach in gusty conditions what is incorrect about that? Its the speed that you cross the threshold that's most important.
I wonder if our ex RAF guru would fly a 4 mile final approach into Leeds with a 30 knot crosswind with the same approach speed that he flys into Wellesbourne with zero wind.
The most important aspect in a flying school is that all instructors teach the same flap setting rather than whether its two notch tor three notch.
By the way if you are going to criticise airline pilot technique why mention VC10s.