BBC- "received, posh..." The spoken English used on that service is understandable to English-speaking people living outside the UK, and certainly is good for ESL students learning the language.

As far as I am concerned, it is excellent, following mostly the usage of the OED and Fowler ((some concessive spelling departures- e.g. -ise instead of ize, and occasional idioms which have spread widely).

I would not watch their news broadcasts if the language used was that of some of the people I heard during visits to the UK (some of the BBC weather people have similarly poor diction). My contacts were mostly with university people, and they were understandable. Posh? certainly not. Educated? Yes.