Why did they stop selling pickled shellfish in pubs?

Some older people have told me that jars of pickled cockles and mussels were regularly sold in pubs. On some nights people would bring in freshly cooked prawns or periwinkle and whelks.

I've checked online and it seemed to be a common thing up until the 80s at least. Can any of the older gaggers remember this and do you think it should start up again?
Why did they stop selling pickled shellfish in pubs?
Why did they stop selling pickled shellfish in pubs?
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