Hi DFC. You'll find that I said "The PAPIs may be disregarded below 200 ft AGL provided your aiming point is safe." Please don't selectively quote out of context.
From Manufacturers' Manual: "Eye to wheel height on approach is 25 feet and minimum recommended wheel clearance over the threshold is 20 feet. Do not follow PAPI guidance below below 200 feet when the PAPI Minimum Eye Height over Threshold (MEHT) is less than 45 feet."
So if you are flying a B737, the ILS at LGW will put you in the 3 reds 1 white PAPI (which is set for B747) when you are below 200ft. At airfields where the MEHT is less than 45 feet, then I have to fly 3 whites 1 red (or whatever it takes) to ensure my aiming point is safe.