24-27 Norfolk House, George Street
According to a photo on Flickr, as of c. 1980 some of these units were occupied by a branch of Safeway (though not all — the supermarket seems to have expanded in the years since). According to another photo on Flickr, it was still Safeway as of c. 1990, though it's not clear how many addresses it spanned at that point.
According to Google Street View, as of August 2008 it was Somerfield, and occupied all the current frontages (numbers 24-27).
By May 2012 the four units were occupied by Waitrose photo, and this remained the case as of December 2019.