Cooper and Leatherbarrow Opticians. Practices in Darlington, Richmond, Barnard Castle and Shildon. Cooper and Leatherbarrow, Cooper & Leatherbarrow, opticians, optometrists, contact lenses, optician, Darlington, Co.Durham, County Durham, Richmond, Barnard Castle, Shildon, North Yorkshire. Cooper & Leatherbarrow is located in the Barnard Castle area of County Durham. There are at least 2 other listings in the DL12 postcode area. Opticians in County Durham DL12