Passing off the British accent as being from Dromund Kaas is a blatant continuity error seeing as the British accent was established as Coruscanti in works preceding SWTOR. The use of Evil Brit accents for the Empire seems strange when Republic stalwarts like Bastila, Admiral Forn Dodonna, Atris, and many more in KOTOR use a British accent, taking place 300 years prior before this Empire was revealed.
Presumably he moves his neck like everyone else to look up.