British citizens who who are paying through the nose for the NHS and energy won't be happy when they see the multi billion pound bill for changing all of the mail boxes, manhole covers, etc from "ER" to "CR" ...
How would getting rid of the monarchy change the NHS and energy bills?
The monarch doesn’t decide the politics of the nation; and I sort of doubt that manhole covers bear the royal insignia.
(And all those folks gathering outside of Buckingham Palace right now don’t seem to me that they’d care much about that anyway.)