Greggs – Landmark, Plymouth – Opening Hours & Store Details Greggs is easily accessible on Forder Valley Road, approximately 2.62 miles north-east of the centre of Plymouth, in Devon (near Forder Valley Local Nature Reserve). The store serves the people of Austin Farm, Leigham, Deer Park, Estover, Derriford, Eggbuckland, Mainstone and Laira. If you plan to drop in today (Friday), its opening times are from 6:30 am – 5:00 pm. Read the information on this page for Greggs Landmark, Plymouth, including the operating hours, location particulars, customer experience and other important info.