I've seen that in London pubs as well but going back many years.
Were they those crisp like things that looked like rectangles of streaky bacon?
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You mean these....
- Did you know your favourite Frazzles have been around since 1975
https://www.tesco.com/groceries/en-G...ucts/292250078
I remember the Cockle Man with cinema-style tray and paper cones of cockles sprinkled with vinegar, but this could have been as recently as the mid-'90s when he used to come into The Holly Bush. I don't remember him coming into any other NW3 pub though.
The seafood man always came round the pubs on a Friday night. Trays of cockles, winkles, prawns and whelks along with the crab sticks. Plenty of vinegar and pepper on mine!
The last time I saw a Cockle Man was in the Smithfield in 2011.There are some pubs with vans and stalls outside selling shell food but the wicker basket delivery in pub is unusual these days.