Post Office – Lockerbie, Lochmaben – Opening Hours & Branch Details Post Office is directly at 20 High Street, about a 3.66 mile drive west from the centre of Lockerbie (near High Street and Lochmaben School). The branch is an important addition to the areas of Hightae, Heck, Lochmaben, Templand, Tinwald and Torthorwald. Today (Friday), hours of operation start at 10:00 am and continue until 4:00 pm. Refer to this page for information on Post Office Lockerbie, Lochmaben, including the business hours, street address, email address and more.