[DTV]

A few examples of when the opt out will happen are given:

[*]Verdict in a court case
[*]A political event especially one not being covered by BBC Parliament
[*]"Continuing coverage when core channel has other commitments" (I presume this means the back half hours on the World version?)

Roughly in in line with what I expected, though I hope UK 'extreme' weather events are included as well - if not purely on embarrassment grounds. I mean, many of BBC World News' key markets are places where actually extreme weather events are semi-regular and have outcomes a bit worse than some bins getting blown over and a car being hit by a tree. I can't imagine, for instance, the reaction of the BBC's many South Asian viewers to hours of coverage of what we in the UK consider 'heavy rain'.

This may be me being thick but does this mean that after the transition period and when the new channel launches “officially”, studio E is no longer being used or it’s just a case of everything in studio C whilst E is getting refurbished?

The email is very clear that the "core channel" will come from C (during UK produced hours) and UK opt outs will come from A. I interpret this to mean that E will be mothballed.

Though I'd bow to your superior knowledge, other sources have suggested differently in the longer term - maybe a final decision hasn't been made or something similar? As you say, there might be an element of financial years at play here and set reconstructions these days take so long that any 'interim' arrangement is effectively a semi-permanent arrangement anyway. It's just hard to believe that A and C would genuinely be the permanent home of the new channel as C's set in particular must be coming towards the end of its technically useful life.