Post Office – Orkney, Holm – Opening Hours & Branch Details Post Office is ideally positioned on A Flett Builders, a 6.11 mile distance south from the centre of Orkney (not far from Lamb Holm and The Italian Chapel). The branch chiefly serves patrons from the districts of Musie Geo, Crow Taing, St Mary’s, Valhalla, Tongue of Westerbister, Taing of Westbank, White Sark and Clads Ber. Doors are open today (Friday) from 9:00 am to 1:00 pm. For more information about Post Office Orkney, Holm, including the opening times, location details and telephone info, please refer to the sections on this page.