Post Office – Duns – Opening Hours & Branch Details Post Office is directly at 24-28 Market Square, a 0.03 mile drive west of the centre of Duns (nearby Duns Park and Market Square). This branch is situated in a convenient area that principally serves the people of Duns Law, Plainfield, Ashfield, Rulesmains, Duns Town Centre, Gavinton, Ladywell and Langton. Its opening times for today (Friday) are from 5:00 am to 5:30 pm. Read the specifics on this page for Post Office Duns, including the operating hours, branch address, email contact and more.