Roast chicken and bacon is the chicken sandwich with the club's defining move pulled forward, and what defines it is the bacon doing the work the bird cannot. Cold roast chicken is mild, lean, and slightly flat on its own; a layer of crisp bacon laid against it brings the three things the chicken lacks all at once, salt, smoke, and rendered fat, and a hard textural edge against meat that is otherwise uniformly soft. The bacon is not a garnish on a chicken sandwich, it is the flavour engine. It is the part that lifts a quiet cold meat into something with a clear savoury identity, which is exactly the impulse that built the club around the same pairing.
The craft is contrast and grease management. The bacon is cooked to render its fat and crisp its edge, then laid in so its salt and smoke run through every bite while its crunch survives against the soft chicken and softer bread. The chicken is sliced or torn into even layers and usually given a thin bind or a smear of mayonnaise, because the bacon supplies salt and fat but not moisture, and cold chicken still needs lubrication to keep from reading dry. A leaf of crisp lettuce and a slice of tomato, salted and drained, are the cool counter that keeps a salty, fatty filling from tiring the palate, and they pull the build toward its club parent. The bread is plain so it carries rather than competes, and butter or the mayonnaise layer seals the crumb against the tomato's moisture so the sandwich holds between assembly and eating.
The variations track how far it leans toward the stack. Add a third slice of bread and a turkey layer and it becomes the club proper; bring avocado and it edges toward the BLAT register; press it warm and the bacon crisps further against the chicken. Plain roast chicken is the baseline without the bacon, chicken and mayonnaise the bound default, and chicken with stuffing the festive reading. Each deserves its own article rather than being crowded in here.