What is interesting is Royal Mint is selling sets with the two 5 pound coins in it but according to the
https://www.thegazette.co.uk/notice/2672807 site, there is another 5 pound coin to come.
The design of the said coins shall be as follows:
‘For the obverse impression Our effigy with the inscription “· ELIZABETH II · D · G · REG · FID · DEF · 5 POUNDS”, and for the reverse a depiction of the Imperial State Crown accompanied by the inscription “MY WHOLE LIFE, WHETHER IT BE LONG OR SHORT, DEVOTED TO YOUR SERVICE” and surrounded by the inscription “SAPPHIRE JUBILEE” along with the dates “1952 – 2017”. The said coin shall have a grained edge, except for the gold and silver coin which shall have a plain edge and in incuse letters the inscription “SHINE THROUGH THE AGES”.’