Specsavers opens at Sainsbury’s Preston Deepdale store   Specsavers opens its fifth concession in Sainsbury's, taking its overall UK and Ireland presence to 800 stores. London, 2017-Dec-05 — /EPR Retail News/ — Sainsbury’s is continuing its mission to provide customers with better choice and convenience with the opening of Specsavers’ 800th UK and Irish outlet in the supermarket’s Preston Deepdale…