Yikes, I knew we were terrible but I didn't realize it was pretty much across the board! What about Gwyneth Paltrow in Sliding Doors? Renee Zellweger in Bridget Jones? Sorry to be so chick-flicky but aren't those performances pretty close? Or are they still noticeable? : \
the problem brits have is that people perceive them with a posh accent, like bridget jones.
but its not true, theres only a minority who speak like that, the thing is with british people you have a massive range of accents, Welsh, northern irish, scottish, english but then we have the cities - London (which in itself there are at least 20 different accents i can recognise, for me i can recognise someone from east london because they tend to speak slightly posher than north london, then you have south london which is very ghetto with 2 main accents, ghetto street and cockney.
then in north london you have the same as south london except that its the sweet mates (white people) who speak cockney (only applies to new youth) then you have the street ghetto (which is white aswell as other mixed ethnities)
then you have west london which is where mainly the richest can afford to live their accents are just annoying.
then lets say if we go to oxford, its like a very posh overall of london accent.
btw iv found the easiest way ever to spot someone isnt from london, its actually so easy that the answer is in the name itself, london.. ask someone to say the word london, within an instant i can detect where a bouts they are roughly from, that because of the l-uh-n-dun is pronounced differently in different areas and is actually harder for northern folk say for instance from yorkshire to replicate a london accent to say london because it always turns out two ways they either say it in their native accent - lu-wn-duwn, or an over exaggerated accent of a cockney and go l-ahn.dun which kinda sounds australian.
the key then i would say to replicating a british accent.. do not try to imitate a londoner! not only does it piss us off which we then slaughter you for doing so, but you lose respect for failing to act properly.
also dont watch green street as an example of cockneys because its full of shit.
Michael caine is an excellent example of an old school cockney, also mike reid who use to play frank butcher in eastenders but died is also an old school cockney.
theres shit films which represent the youth of today in london such as, the estate -
http://www.imdb.com/title/tt1786699/
and anuva hood
http://www.imdb.com/title/tt1658797/
how they speak is how todays youth generally speak, the ghetto street talk