Today is the 65th anniversary of HM Queen Elizabeth II's accession to the throne and the Royal Mail mark this sapphire anniversary with what is a familiar stamp.
Almost exactly 40 years ago the blue and slightly pink £5 was issued on 2 February 1977 and this now reappears in what I expect we shall be told is sapphire blue. The new stamp has the same dimensions and the security iridescent text reads 65TH ANNIVERSARY OF ACCESSION. There are no ellipses in the perforation.
An excellent choice in many ways and a nice addition to the Machin line.