It’s my understanding (per an excessive obsession with Daily Mail comments on this subject) that yanking Duke and Duchess would revert the couple to Prince Harry and Princess Harry/Henry. Removing the HRH, the prince title and changing succession would need an act of parliament. The HRH would be removed from the Duchess if the two were to divorce.
People who know about these procedures would rather see the throw away titles stay in place the have them running around calling themselves prince and princess.
Who’s to say we won’t see bills in parliament?
The last thing the House of Windsor wants is anyone getting a look at its financials.
I suspect what’s going on now may have a lot to do with that.
A game of chicken is being played.
But if it becomes public that Harry is here on a diplomatic visa so that the Harkles can get out of paying income taxes in the US, God help both the Harkles and the House of Windsor because Americans will NOT be amused.