I am actually envious. Nice topic! : )
As it is after midnight, I cannot right now think off the top of my head about the title, but any book with Queen Victoria's letters should start you off nicely. I believe there are several. That should give you a start re the Alix/Ella angle.
Any book dealing with the politics at the time of Alexander II/III will help illustrate the differences between Russia and England. Several mention the mutual personal dislike between the Russian Tsars and Queen Victoria, and political differences. The Boer War: a sticking point of contention.
Sorry for the vagueness, but it is late in the day. Hopefully I'm a bit clearer tomorrow, or else someone else can be more specific!