Small? The Appalachians today are the resting skeleton of a mountain range so tall and enduring that the mud and sand that washed off them piled miles high and formed the Catskill mountains. The Appalachians were so mighty that their garbage formed mountains
This is just another study confirming what has been known for years. MLE is the multicultural expansion of cockney. Much of the accent survives, but has been modified by exposure to many cultures. Its been identified as the dominant native london accent foresomething like a decade.