RootsChat.Com

  There was a link on the Lost Cousins newsletter to a British Library collection of recordings made of POWs in Germany in WW1. It includes 2 recordings of Kentish men and was very interesting to me. They were both from West Kent, much the same age as my grandfather, but with much stronger accents.
   I was particularly interested in something said to be Kent dialect, but which seemed to be well gone by my time - pronunciation of "th" as "d". Also mixing "v" and "w", which there was still a ghost of in my grandfather.
   I recommend a listen.  Berliner Lautarchiv British & Commonwealth recordings

  I expect most of us say "should've" and "would've", and it is only a very short step to "should of". In fact it is virtually the same.

  I have just looked at 1921 for the street of early Victorian terraces in Chelsea, where a relative lived in the 1950s, sharing with another family. The house had a half basement and 3 further floors, but only 2 rooms on each floor. Several of the houses in 1921 have 5 separate schedules. The houses may have varied in size a bit, but I wouldn't think by much. (They are much posher now.)
   I haven't paid to open up any of the records!

  Forbidden is standard in British English.
 I had to go and find a website! The general opinion seems to be that gotten disappeared here 300 years ago. But the use of gotten in America seems more complex than you might think, as grammar often is. Quote:-
  " Roughly: when talking about a static situation (possessing or needing) the past participle is got; when talking about a dynamic situation (acquiring or becoming) the past participle is gotten. So:

    Yesterday I got a new guitar
    I’ve got a great guitar
    I’ve gotten a new guitar
    You’ve got to see my new guitar
    I got into playing the guitar last year
    I’d gotten into playing the guitar the previous year"

 The writer also thinks that more people in Britain are coming to use it.