HBO is covering more ground than I realized. Thanks to a tip from raijap, we have this trademark filing with the U.K.‘s Intellectual Property Office. Very similar, for the most part, to the various U.S. trademark filings covered in previous posts, but presented in a much more readable package.
At a guess, with E.U. harmonization, this probably means these marks are good throughout the E.U. Interestingly, the representative legal firm is Spanish, and the second language of the filing was Spanish. This highlights how increasingly international HBO’s business is becoming.