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A radio ad for Costa Coffee has been banned for discouraging consumers from buying avocados.
Coca-Cola is set to buy the coffee chain from Whitbread.
The coffee chain is the latest high street shop to suffer a decline in consumer spending.
Watch how Mike Parry and Mike Graham react to the latest trend in coffee drinking
A BBC investigation said seven out of 10 samples at Costa contained faecal bacteria and three out of 10 contained the bacteria at Starbucks and Caffè Nero