Royal Succession: And You, You Will Be Queen

Fagburn thinks we should abolish the royal family.
I know they bring some happiness into the lives of a lot of people who are - how can I put this? - a bit thick, but the institution is incompatible with democracy.
So I'm not desperately excited by any attempt to "modernise" something that's inherently medieval.
It's like saying you're going to put a safetybelt on a ducking-stool - so what!!?
If this country hasn't come to its senses by then, it appears that the first-born child of Prince William Battenberg-Cake of Suxe-Coxburg and Gothic-Bold could succeed to the throne even if - heaven forfend - it's a girl.
And further, our monarch will be able to marry a Catholic.
Betcha by golly wow!
But would this theoretical future King Of England be allowed to civil partner or get gaymarried?
And, if so, what title would the king's husband have?
Fagburn will try and chase this up with "constitutional expert", Norman St John Stevas forthwith.
But please don't hold your breath - I don't actually give a fuck.

• The illustration is from a childrens' book showing Blondel, faithful minstrel, close friend and "special adviser" to King Richard I of Lionheart fame.