 During the time that this episode was being filmed,  John Thaw (qv)s wife, Sheila Hancock (qv), was awarded the OBE.  When John returned to the set the day after he had accompanied  Sheila to Buckingham Palace for her award ceremony, during the  filming of the scene in Colet Gardens where Regan and Carter are  following Sandy Williams car, the crew held up a clapperboard  marked "HRH", rolled out a red carpet and saluted at John. This  red