Langley is very much it’s own place. It’s growing rapidly with so many people moving out there due to real estate prices. Some people get a little fuzzy about where Surrey ends and Langley begins but as far as I know Langley begins at 200th st and continues easy to 264th or something like that. Some people call the eastern area of Surrey (Clayton heights, around 180th eastward) Langley but it’s still Surrey.
White Rock is still its own separate city with its own city hall and whatnot. White Rock proper only begins from 16th ave south to the beach, north of that is just south surrey. People in south surrey say they live in White Rock to avoid the stigma of living in Surrey, or at the very least make sure to specify that they live in SOUTH Surrey .
Delta is still its own city with its own city hall and whatnot but one of the three parts of Delta, North Delta (where I live), is becoming sort of a de facto Surrey. It’s divided by 120th street but if you crossed 120th street, north of 72nd ave, and drove west until 112th street you’d have no clue it wasn’t Surrey. Looks the same. However, Ladner and Tsawwassen (the other two parts of Delta) are very much separate from Surrey.