A new food scandal has been uncovered, with fake fish discovered in shops and supermarkets across Scotland.
The Sunday Mail reported that tests carried out on a number of products revealed that expensive fillets sold as haddock were actually a different fish altogether.
Food experts said that a major programme of testing should be carried out around the country, while the Food Standards Agency undertook a separate investigation which showed that one in ten restaurant dishes do not use the fish which is listed in the menu.
The source obtained a copy of the report which was sent to the Scottish Food Enforcement Liaison Committee. It looked at smoked fish fillets, which are often coloured yellow as part of the process, possibly disguising through appearance and taste which fish is being used.
The study revealed that out of 30 samples bought, eight of them were not authentic. Almost a quarter of smoked haddock pieces turned out to be whiting, which is a cheaper product by around £5 a kilo.
A source told the newspaper that the testing programme which was recommended by the inspectors back in 2008 never actually took place.
"It appeared that while some staff were deliberately substituting cheaper whiting for haddock, others did not know the difference. The report recommended that further testing be carried out by the authorities. The results may have simply been the tip of the iceberg in what was a major-scale food fraud," the insider said.
The news comes on the back of the recent fallout from the horsemeat scandal, while it was also revealed by the Sunday Mail earlier this month that more than one-in-three curries tasted in Scotland were fake.
A common move was to substitute cheap beef in place of lamb, and a meeting held between the Bangladeshi Restaurateurs Scotland and Bangladesh Catering Association Scotland has called for council executives to name and shame the corrupt 46 restaurants.