Following on from my previous post, I’ve posted my findings regarding Bing’s regional failings on the Bing webmaster forum, which happens to be full of similar reports. I got a response back from Brett Yount, Program Manager, Bing Webmaster Center, which seems to acknowledge that Bing has some problems when it comes to regional indexing:
Aidan,
I’ve brought this up with our indexing team to see if we can find a solution. I’ll let you know as soon as I hear back.
~B