Re: Act now!
Hummm, now that's be an interesting one. Since they have "different ethnic origins", and one of the main motivation for the Brexit voters was/ is to reduce the numbers of those pesky foreigners, are we going to ask the royals to leave the UK? Oh, and if your argument is that you don't want to be ruled by Belgium:
"As of 2016, branches of the family still reign in *Belgium*, the *United Kingdom*, and the other Commonwealth realms". (https://en.wikipedia.org/wiki/Saxe-Coburg_Gotha)
Then again, with rising UK food prices, I suppose it's helpful that your family name is similar to that of a (German) sausage... http://www.germanfoodguide.com/wurstdetail.cfm?wurst_number=7
"We will fight them on the beaches..."