Remember the Queen’s mother lived to 102, so maybe the Queen inherited genetic longevity. A possibility, I think, reflected by her Scorpio-enduring natal Saturn, so prominently conjunct her MC and parental axis.
I got a few ideas about the transit tension in the Queen’s chart, including:
-actively preparing for the future (T Jupiter squaring her ASC-DSC);
-and welcoming retirement (T Neptune conjunct her natal Venus, Sun ruler);
-after executing an official transfer of royal power (T Pluto conjunct her ASC and Nodal Axis, self-willed identity change and public transformation);
-and seeing her son Prince Charles crowned King (T Uranus conjunct her natal Sun and his natal Moon).
The eclipses in July 2018 will contact the charts of the Queen (21 Cancer solar eclipse conjunct her Node-Descendant) and Prince Charles (5 Aquarius lunar eclipse conjunct his Descendant), perhaps sensitizing an opening for change in their relationship.