Westcountry do have the current set of titles and astons.
And to answer the original question, there are four outputs from the four news sub-regions. The West (most of Cornwall) is output from a studio in Truro. The North (North Devon mostly) is output from a studio in Barnstaple. The East (Somerset and Dorset) is output from a studio in Exeter, and the South is output from Plymouth. Incidentally, the South's sub-regional studio is the old CSO studio that used to be used for all short bulletins.
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