Then I politely suggest you re-read my post #4 where I clearly state that I do not want to use the search facility. Which was written before your reply, so you clearly cannot have read post #4.
Except your answer does not solve my problem, or answer my question. Yes, there's a fudged, bandaid, way of doing it (which you and others have pointed out) but it does not solve the problem of browsing listings and filtering out only UK ones.