Image of staff entering (cheese wrapping room?)

Photograph by Brian Shuel which appears to show staff going from a corridor into the room for cheese wrapping (as shown on /27-28). It is possibly in a Sainsbury's branch (Sainsbury's supermarkets of this time often had fairly large preparation and wrapping rooms) or in a depot. The picture is part of a set of black and white images most of which are similar to or show the same subject as the colour images published in the book 'JS 100: The Story of Sainsbury's' edited by James Boswell (1969). This image does not appear however to match with any in the book.