I know that RP is an accent .
Okay I know that RP is an accent which is prestigioso in England .And that the SE is what foreigners of the English language learn at school -as a second language -

Actually this question has been asked by a teacher ,although I have an answer -which defining the two - I was wondering what others have to say about it

R.P is the old BBC conservative ( out of date) tried to make standard but .... and standard is what real people speak

I am also a linguistic. - Just didn't think that mattered . Thanks for the thumb down - It's common in the children's corner!

There is no such thing as "standard English". In Britain, RP is often considered to be "the standard", but there is a competing standard (which is very similar to RP) known as BBC English. But there is NO "standard" version of any dialect of English (on any continent). "Standard" means that there is some official body that determines what "good speech" is. There isn't any such thing. Indeed, in the 18th century there were pedants who wanted to establish such a thing, but the British people roundly defeated the effort as an infringement on their personal prerogatives.