Unfortunately you are unlikely to get that information anywhere before you'll get it from RIM - RIM are notoriously "quiet" about their major infrastructure outages. Most levels of t-support customers do not even get direct notifications. I have tried calling RIM t-support in the past, and the most info I get on T2 is "we are working on it". There are customers with a higher level of access to info with RIM, but many are bound by NDAs.
Bottom line - this site is not owned or affiliated with RIM. Until they release an official statement, we would all just be guessing what is wrong/why RIM have had 2 significant EMEA outages in past few weeks/whether it will happen again soon.
Also BES 5 high availability is not really relevant here. You can have as many HA configs as possible, but when the SRP link is down, it is game over.
: Infrastructure Architect, Denver CO