Not a "Sir" edit

pire which doesn't permit the title "Sir" or "Dame" in front of one's name. See Order of the British Empire.

citation needed on statement about being the longest serving chairman of a top 100 public company in the UK edit

The University of Leeds Centenary celebration ceremony here: http://www.leeds.ac.uk/centenary/celebration_ceremony/morrison_citation.htm mentions this. Would that be a valid source or would another source be needed?