I suppose I’ve been living in London too long, but I can discern people who e grown up in Barnet, and others in Leytonstone. I guess other parts of London have

I suppose I’ve been living in London too long, but I can discern people who e grown up in Barnet, and others in Leytonstone. I guess other parts of London have subtle dialects too, but I’ve not worked those out. Can dialects like that survive the onslaught of Estuary English?