Okay, I know it's A1900, but this will take place in the post-1900 era, save three years.
Your challenge, if you choose to accept it, is to make Kaiser Wilhelm II, King of Britain, while retaining Germany. Effectively meaning, you have to create a German-dominated Anglo-German Empire.
This would mean that within four years (1897-1901), you have to change the British succession to allow Princess Victoria, German Empress to ascend to the throne, and her son to succeed her when she dies in August 1901.
Go!