Post Office – Lampeter, Llanfair Clydogau – Opening Hours & Branch Details You’ll find Post Office easily accessible on Llanfair Clydogau, about a 3.43 mile driving distance north-east of the centre of Lampeter. The branch is a significant addition to the areas of Llangybi, Llanddewi-Brefi, Silian, Cellan and Llanfair Clydogau. Today (Friday), you can visit from 9:00 am until 5:30 pm. Read the information on this page for Post Office Lampeter, Llanfair Clydogau, including the open hours, address description, telephone number and more.