The British accents you hera on the TV might not reflect the full diversity of spoken English. here's an attempt to give you a taste of the English you might here in a London pub:
Oright me ol' china? Wherya bin?
Artnabart, innit.
Wanna bevvie.
Nah, gorra gedda moveon, etc.
While I like the regional varietires, many of them would not strike many as the correct and proper. London grammar includes:
He don't (pronounced wivou' the 't')
I says
Innit
And that's before we move onto the joys of Cockney Rhyming Slang.
