Came across this collection of old black and white slide pictures of many of London's Old Markets.
https://spitalfieldslife.com/2024/06/20/the-markets-of-old-london-i/
[snip]
Of those included here only Smithfield, London’s oldest wholesale market, continues trading from the same building, though Leather Lane, Hoxton Market and East St Market still operate as street markets, but Clare Market, Whitechapel Hay Market and the Caledonian Rd Market have gone forever. Meanwhile, Billingsgate, Covent Garden and Spitalfields Fruit & Vegetable Market have moved to new premises, and Leadenhall retains just one butcher selling fowl, once the stock-in-trade of all the shops in this former cathedral of poultry.