Because the UK users needed somewhere they could post when they needed a quick answer - there's only a relatively small subset of British based posters read the UK & Ireland forum - I usually check it personally every 3-4 days - and the users of the BD forum also are the most knowledgeable lot about UK train travel, as they tend not to be London based, so also tend to use trains a lot themselves as trains and planes tend to be pretty interchangeable for domestic travel here. So out of those two facts, BD became the unofficial place to have train queries posted about UK travel. Yes, its predominantly known about by the brits, but OTOH, questions which get raised in there get much fuller answers than anywhere else on the board. And unfortunately, if the people that can answer the questions don't read the boards which some people believe they should be reading where those questions should be posted, it's not going to work as a source of information. Hence our move onto plan B, because plan A wasn't really working that well for the people who ask and answer most questions about rail. Sorry if it offends your sense of correctness, we tried to address it once more to improve the situation, but once more, we've been told it's not appropriate for FT to have rail forums.
United is moderated. BD carelessly misplaced it's moderators, doesn't know where to find them and doesn't know when they are going to return - we've tried putting out tempting treats and everything to tempt them back

And yes, we could report them as misposted threads for the senior mods to pick up on, but why should we? A lot of the users of that forum prefer to have rail questions in there... There's a point where FT works because of the goodwill of the members, and this is (IMHO) one of those points.