Question about marriage betwen Royal households

[NJRedDevils]

I was wondering , as an example say Lord Frederick of Windsor was dating Princess Madeleine of Sweden and they wanted to marry, does Freddy ask his head of the Royal Family been QEII, b4 asking King Gustav for permission or does he just ask King Gustav?

I know in commenor life the guy asks the girls father/parents.

Or Like CP Frederik, he asked his mother and CP Mary's father for their Blessing. But i was wondering how would it work between 2 different Royal Households wanting to Marry?

[norwegianne]

They would have to ask permission in both countries, the order in which this would be done doesn't seem to be set. It would also depend on if there was a requirement to gain the sovereign's consent on the marriage and not, I think.

Given that Frederick is above the age of 25, he wouldn't have to have the Queen's permission, but if he didn't ask for it, he would have to give notice to the Privy council and then wait 12 calendar months to marry. From what I've gathered from the Royal Marriages act of 1772, anyway. I'm not sure how this would fit into the Act of Settlement from 1701, though?

I suppose as Madeleine is currently 3rd in line in Sweden and Frederick 31st in the UK, as well as the last person in line, it would be more likely to appeal to her father to ask the cabinet for permission for her to wed.