Context: National and regional variations also occur within the BBC One and BBC Two schedules. England's BBC One output is split up into fifteen regions (such as South West and East), which exist mainly to produce local news programming, but also occasionally opt out of the network to show programmes of local importance (such as major local events). The other nations of the United Kingdom (Wales, Scotland and Northern Ireland) have been granted more autonomy from the English network; for example, programmes are mostly introduced by local announcers, rather than by those in London. BBC One and BBC Two schedules in the other UK nations can vary immensely from BBC One and BBC Two in England.

Question: How many different areas does BBC One accommodate with customized broadcasting?
Answer: fifteen

Question: Which parts of the UK have more control over their BBC broadcasts?
Answer: Wales, Scotland and Northern Ireland

Question: Who hosts shows on BBC broadcasts outside of England?
Answer: local announcers

Question: What kind of coverage might take precedence over standard BBC programming?
Answer: major local events

Question: How many regions is BBC Two's output split up into?
Answer: Unanswerable

Question: What city are the announcers of Wales, Scotland, and Northern Ireland mostly from?
Answer: Unanswerable

Question: What occurs between national and local BBC schedules?
Answer: Unanswerable