Welcome to the Q&A Forum

I'll put the content/user considerations aside for a moment, since I can't comment on content I can't see, and focus on the technical SEO aspect. You could reverse the 301-redirect, and send it back to the old page, but I'll be honest - it's likely to take a while for Google to process it. They're likely to be confused by the reversal. It's a tough call, but what I think I'd do in this case is the following. Let's say the original URL is (A), the "new" URL is (B). Currently, you're 301-redirecting (A) --> (B), and now you're going to put the content back on (A)... STEP 1 Remove the 301-redirects Rel-canonical (B) --> (A) Rel-canonical (A) --> (A) Change the signals from a 301-redirect to rel-canonical may help nudge Google. It will also allow you to place a self-referencing canonical on (A), which could help offset the old 301-redirect. STEP 2 Once the URLs are cleared, put a 301-redirect back in place from (B) --> (A) You could also just leave the canonicals, if they seem to be working. These situations often require some monitoring, to make sure Google is processing the new directives correctly. Give it time, though - don't panic and change things every week, or you could make the situation worse.

I think most of the major media markets would have distribution in both, so there's a good possibility that the UK PRs would indeed "bleed."