I remember flying some 50th anniversary first day covers on the 27th July 1989 in XS235. This was to celebrate fifty years since the first flight and, if my memory serves me, we went to Hatfield. Unfortunately I cannot remember what I did there but it wasn't a full stop as the log book shows Boscombe to Boscombe. There was another 50th flypast at Martlesham Heath on the 4th Sep 89 but what 50th I'm not sure. Queen of the Skies!