I haven't seen 'Queen Mab' in person, but this rose never shows pink, at any time of the year or at any stage of its bloom, in my experience, and is consistently a true apricot (like 'Lady Hillingdon'), unlike what the photos of 'Queen Mab' show (except of course for the time it bloomed pure white, as in the photo I just put up - and below!).
Well, Patricia, what an interesting observation! Perhaps some affinity with the 'Lady Roberts'/'Anna Olivier' line? The color on this rose can fade precipitously in certain weathers. Here are photos of a half-open bud this morning, after it rained all day yesterday. There are still traces of apricot color deeper inside, but the color is overall very pale.