Two curry house owners poisoned 32 people with a chicken biryani – and may have also caused one woman’s death.

Kamran Memon and his wife Farhana Memon, who run Karachi Karahi in Plaistow, East London, provided the buffet at a Sindhi event – despite repeatedly ignoring food safety warnings.

A 39-year-old woman died the day after the August 2013 celebration.

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

As a result there was insufficient medical evidence to present to the jury when the owners were prosecuted, Newham Council said.

The cause of the woman’s death was given as bowel ischemia and heart attack.

More than 140 people from all over the country and abroad attended but the following day several of the guests fell ill.

The Barking Road eatery was inspected the next day, with environmental health officers taking food samples for analysis.

The restaurant was immediately banned from providing outside catering.

The owners were also found to have ignored two improvement notices for breaching food safety rules.

The couple pleaded guilty to charges of failing to maintain a proper food safety management system and properly train staff.

A jury at Snaresbrook Crown Court found the pair guilty of supplying unsafe food.