Post Office – Llanelli, Ann Street – Opening Hours & Branch Details Post Office occupies an ideal location at 18 Ann Street, about a 0.17 mile distance south-east of the centre of Llanelli (near Bigyn Bigyn Park Terrace). This branch serves the people of Llanelli Town Centre, Tyshia, Seaside, Trostre, Machynys, Morfa, Bigyn and Pemberton. If you would like to drop in today (Friday), its business hours are 8:30 am – 5:30 pm. Please review the specifics on this page for Post Office Llanelli, Ann Street, including the working times, location particulars and direct phone.