As you spend more time here, you'll see that in addition to this general forum for discussing airline-independent miles and points topics, there are also forums for each major airline. You'll also find that there are many active posters from the UK, most of whom participate (among other places) in the UK and Ireland Travel forum. There are also quite a few real-world get-togethers in the UK, including a large one in mid-February that has been running for eight years so far. These are discussed in the CommunityBuzz forum, the first thread of which is a consolidated list. There is a lot of information in FT: with over 12 million posts and a quarter million members, this sort of structure is the only way to keep things straight!

For your specific question, I would look at the forums for UK-based airlines, such as those for BA's Executive Club and bmi's Diamond Club. Their offers tend to focus on their UK customer base. After that, I would look at the forums for European airlines, as many of their offers are for all Europeans. If you still have a question after reading those, posting a specific query in the appropriate forum will undoubtedly get some useful replies.