Pizza Express in Shoreditch occupies a building formerly used as workshops for furniture-making. A rather faded trace remains: the words above the right-hand window read 'Butler' at the top, and probably 'cabinet factor' below that. (Credit to Maggie Jones and Traxcitement, who had deciphered the lower words over on flickr).
A rather nice touch is the contrast between these plain, faded letters and the very recent, very colourful contemporary signwriting on the building to the right.