Post Office – Londonderry, Rossdowney – Opening Hours & Branch Details You’ll find Post Office at 1 Rossdowney Park, approximately a 0.38 mile distance south-east from the centre of Londonderry (a few minutes walk from Irish Street Park). The branch is an outstanding addition to the local businesses of Bogside, Londonderry/derry, Kilfennan, Lisneal, Drumahoe, Rosemount, Tullyally and Brandywell. If you’d like to visit today (Friday), it’s open from 8:30 am until 5:30 pm. This page includes hours of opening, place of business address details or direct contact number for Post Office Londonderry, Rossdowney.