I Tananarive cross the fee survey for 2017 in the Architects' Journal.   It may be useful for some. YOu can register for free, or put the link into Google and surf in from there and it will give you the whole thing.   https://www.architectsjournal.co.uk/news/aj-fees-survey-2017-how-much-are-you-charging/10020125.article   If you find a later one, please add it here.   Ferdinand