This area pertains to postal codes and sectors operating from the St Albans Royal Mail delivery office, situated in the Brick Knoll Park locale on the eastern edge of St Albans in Hertfordshire. Whilst mainly covering the immediate St Albans area, this delivery office also services Harpenden. Predominantly these postal codes refer to PO boxes attached to the delivery office, and such PO boxes are utilised by businesses wishing to use private mailing systems for their correspondences. Typically these are fairly large businesses receiving upwards of 25 items of mail per day.

Although a delivery office, this particular Royal Mail branch does not offer services such as financial services, vehicle tax services, or Parcelforce services.

Opening times at the St Albans Delivery Office vary from day-to-day, so it’s important to regularly check the collection times. The branch is open Monday 08:00-10:00, Tuesday-Friday 08:00-10:00 and 16:00-18:00, and Saturday 08:00-12:00.