Kamran Memon and his wife Farhana Memon, who own the Karachi Karahi in Plaistow, east London, gave the buffet to the Sindhi Association of Europe occasion in Chigwell in August 2013.

But health officials were not alarmed until four days after the outbreak so a full post-mortem examination was not did.

Thus there was insufficient medical confirmation to present to the jury when the proprietors were arraigned, Newham Council said. The reason for the lady's death was given as bowel ischemia and heart attack.

More than 140 individuals from everywhere throughout the nation and abroad attended the event and the next day a few of the visitors fell sick.

Environmental health officers and Public Health England reviewed the Barking Road restaurant taking food tests and instantly banned it from giving outside catering. It additionally discovered the owners had disregarded two improvement notices for rupturing food safety regulations.

In November 2012 after an assessment by the food safety group the eatery take away voluntarily closed for a day to experience a deep clean. Another investigation in July 2013 a month prior to the food poisoning found there was an absence of training for food handlers and it didn't have food safety management system set up.

And the couple had not tried to comply with either notice.

In November Public Health England finished up their report on the food poisoning outbreak. It stated that the lab testing did not identify an organism to clarify the reason for the illness. However the epidemiological study distinguished this was most likely a point source outbreak brought about by consumption of chicken biryani.

The judge is due to get more detailed briefings and standard whether he will take the death into consideration at a pre-sentencing hearing. The couple confessed to charges of neglecting to maintain an appropriate food safety management system and properly train staff.

Taking after a trial they were found guilty of supplying dangerous food at Snaresbrook Crown Court.

Councilor Ian Corbett, mayoral counsel for environment and leisure stated that it is unsuitable that any business can think they can escape with supplying unsafe food to their clients. It is downright unsafe and irresponsible.