Editing Sandwich (section)

==Pre-made sandwiches==
[[File:Quality Dairy Commissary.jpg|thumb|Pre-packaged sandwiches]]
Sandwiches have been widely sold in cafes, railway stations, pubs and diners since the invention of [[sliced bread]] in the 1920s.<ref name="wilson">{{cite book |last1=Wilson |first1=Bee |title=Sandwich: A Global History |date=15 October 2010 |publisher=Reaktion Books |isbn=978-1-86189-891-3 |url=https://books.google.com/books?id=ydR5na_9fnYC&pg=PP56 |language=en |access-date=26 September 2020 |archive-date=25 April 2024 |archive-url=https://web.archive.org/web/20240425182552/https://books.google.com/books?id=ydR5na_9fnYC&pg=PP56#v=onepage&q&f=false |url-status=live }}</ref> Sandwiches kept unwrapped, drying up and edges curling, until they were sold, were widely found in Britain until the 1970s. Cafes and buffets in railway stations and on trains were notorious, and the term "[[British Rail sandwich]]" was often used satirically.

In 1979, the British store chain [[Marks & Spencer]] introduced a small range of chilled, pre-made sandwiches sold in wedge-shaped boxes, sealed to keep them fresh.<ref name="wilson"/> As they proved popular, a small experiment involving five stores rapidly grew to cover more than one hundred stores. Within a year, the store was looking for ways to manufacture sandwiches at an industrial scale.  By the end of the decade, the British sandwich industry had become worth £1bn.<ref name=":0">{{Cite news|url=https://www.theguardian.com/news/2017/nov/24/how-the-sandwich-consumed-britain|title=How the Sandwich Consumed Britain|last=Knight|first=Sam|date=24 November 2017|work=The Guardian|access-date=4 December 2017|language=en-GB|issn=0261-3077|archive-date=4 December 2017|archive-url=https://web.archive.org/web/20171204222918/https://www.theguardian.com/news/2017/nov/24/how-the-sandwich-consumed-britain|url-status=live}}</ref> In 2017, the British sandwich industry made and sold £8&nbsp;billion worth of sandwiches.<ref name=":0" />
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