There is one thing I've noticed, particularly on tv from commentaters is in the last decade or so, is a gradual change of the vowel 'u'. We all know how we pronounce it in lanky and we all know how the southerners pronounce it. But there are alot of english words that have to be pronounced like the lanky 'u' regardles of where your'e from. For example:- J.W.Bush. This name should be pronounced with the lanky 'u' but the habit of the toffee nosed buggers has been to pronounce it somewhere between the southern 'u and almost like they are saying Bash. Its almost as though they don't want to associate themselves with the lanky 'u' any more. They have even started doing it with the words ' would and could' and other like words. Silly sods. Me , well I like my own accy dialect best even though I can speak oz no worries. Sometimes I find myself mixing both together, especially after a few turps.
or when I meet another pom with an accent. The Welsh accent I like and the Irish as well. American!! No thanks.