CO2 based VED helped kill off Subarus here.

Due to permanent and real AWD, and Subarus engines namely 2.0 litre and above the NA engines whilst competent don't really give enough performance for the staggering grip available, and once you turbocharge those engines you immediately go up into high VED and fuel usage is predictably high.

Subaru didn't follow other makers and fit part time AWD systems, simply because those part time systems are not reliable or tough enough for them and don't offer the reliable instant grip a Subaru can give in the most appalling weather, but then with the country and its roads being so crowded where can you use that competence, apart from Scotland snow is rare enough to no longer be a serious issue to consider at the moment, though that might change.

Times move on, few people now would make use of what a Subaru can offer, similarly Toyota withdrew their flagship Landcruiser 200 from UK sales a couple of years ago, it's probably a lot to do with image and badge cachet, the wrong badge even if the vehicles are among the best and most reliable at what they do in the world they won't sell here where image is of the utmost importance in middle class and above price range.