Is there any difference between AE and BE when pronouncing words like "am", "bank", "hand", "romantic", "permanent", "andrew"... etc ? because when I listen to the audio in WR I can appreciate that in AE it sounds like and "e" in "letter" and when I hear to the UK one it sounds like an "a" in "tap".
Thank you for your help
and if you can give more examples it would be great! 
Thank you for your help