What I'm looking for is somewhere I can find a quintesentially traditional English breakfast. Ideally this breakfast would be quite affordable and, more importantly, near Marble Arch or Bloomsbury. I'm staying on Oxford Street but realize I probably won't find much right there; I'm looking for something that may be located off a side street or something that I might not otherwise have noticed. I'm also spending some time by UCL's campus, so that's why I mentioned the Bloomsbury area.
Any good pubs, maybe with some history, by Marble Arch/Bond St tube stops would also be great. Ideally walking distance just for a quick pint or two would be better rather than something that's a tube or bus ride away.