I assume he didn't view the Brits the same way he did the Slavs. Was lebensraum on the agenda? Mass genocide? If I recall, wasn't the King at the time a secret supporter of the Nazi party?
While you're waiting for more answers, there's a lot of info on Axis alliance and post-war plans in the FAQ
edit: featuring answers by /u/depanneur, /u/Georgy_K_Zhukov, and /u/kieslowskifan, among others.