Post Office – Llanarth – Opening Hours & Branch Details Post Office is situated in an ideal position on Costcutter Service Station, 0.22 miles south-west of the centre of Llanarth (by Llanarth School). This branch looks forward to serving the patrons of Llwyncelyn, Llanina, Gilfachreda, Llanarth Town Centre, Capel Cynon, Cei Bach and Dihewyd. Working times today (Friday) are 9:00 am to 1:00 pm. This page includes information for Post Office Llanarth, including the business times, place of business address details and customer experience.