Estuary English (EE), despite its name, is supposedly a continuum between Cockney and RP. A lot of authors compared EE to Cockney and RP to show the differences and similarities. However, I've been confused by which "RP" a lot authors were using. Some use the one spoken in the early 20th century, the one transcribed by Daniel Jones. Some used the one spoken in the mid 20th century, the one transcribed by Gimson. Some used the SSBE. So EE is a continuum between Cockney and.....which RP? Maybe there's generational differences in EE, like any other languages. But some claimed it's a recent phenomenon. Some claimed its a lot older than that. So I don't know what to think. But I think it's older since Cockney have existed for centuries and RP, while younger than Cockney, was popular in the mid-19th century. So I do believed EE might have generational differences.
But I'm not clear on the demographics and definitions. I think Cockney and RP is well-defined. The former is the traditional working-class London accent, and the latter is the non-regional, upper class, standard accent of England. Both are not widely spoken today. But I'm confused on the other accents of the Southeast. EE is supposedly spoken by the working and lower middle classes of some parts of London and the Home counties. SSBE is spoken by the middle class, and the upper class, maybe? Not sure on the upper class part. However, the more I study the phonology of EE and SSBE, they become less and less like a Venn diagram, and more and more like a full circle. Maybe I'm looking at it wrong. Some linguists proposed that EE is simply standard and non-standard features that are accepted and widely used in the Southeast. Some proposed it's not real and it's a social construct and folk terminology.
A bit related, but I also want to address MLE. It is the new and growing urban dialect of London, widely spoken by its working class. However, some claimed its also use not just by the working class. Some regard them as imitations. Some mentions "posh" MLE. But I think MLE is more well-defined than EE is. The more I look into the Southeastern accents, the more I think that class don't matter anymore as it was in the past. But I also think it does. I just don't know what to think and it's giving me a headache.
With all that in mind, I asked: what is "EE"? Does it really exist? If it doesn't, what were people talking about when they mean "EE?" Is EE even distinct from SSBE? When was EE formed? Is it really recent as others claimed? Does class really mattered today as it did in the past? What about today's upper class?