Hi there, I think the problem is that the site hasn't registered you as a member of the High Wycombe local site. If you go to this page and click High Wycombe in the list, it should add you to the list for High Wycombe and you'll be able to see that thread. Let me know if that doesn't work.
The answer is probably that someone suggested Milton Keynes and then volunteered to be Tsarina, even though it wasn't on our original list. Please don't worry, there's noMK bias here at HQ, though I've always had a soft spot for concrete cows