Were/are English emigrants more likely to go by choice?

If you had to compare then "brogue" of SE England and Ozzie "strine" You would be a very foolhardy person to discount the obvious closeness compared to Welsh, Scottish, Geordie, West Country or even the Midlands.

I think you will find the surviving accent is heavily biased to London and the Home Counties. How's that for forced emmigration?

I am sure what I spotted will be commented on but I leave it to the debating chamber. Over to you.

BTW if you want italics try this:

<I> paste/type your text & italics text will appear </I>
(type as seen - I have used a bit of HTML to display it for you)