Sorry to correct you chaps; but IMHO the best way to the perfect bacon sarnie is as follows.
Hop on the train for the 15 minute ride to Sandy Park on match day, home of the Exeter Chiefs.
Just past the players entrance is both a bar and a stall that provides a truly super bacon and egg sarnie, (or sausage and egg if preferred) Apply brown sauce to taste, then wash down with a pint of Otter Amber or Guinness.