The 56-year-old was found unresponsive at a home in London in July a year ago last week.

Her death certificate has listed O’Connor’s cause of death as chronic obstructive pulmonary disease (COPD) and asthma, according to a report in The Irish Independent.

The death was formally registered by O’Connor’s former husband, John Reynolds, on Wednesday (UK time) in Lambeth, London.

The certificate notes the cause of death was “exacerbation of chronic obstructive pulmonary disease and bronchial asthma together with low grade lower respiratory tract infection.”

The Independent reports that the legendary singer had been suffering from a respiratory tract infection which ultimately led to her death.

The death was certified by Julian Morris, senior coroner for Inner South London, after a post-mortem examination without an inquest.

In January, the Southwark Coroner’s Court confirmed O’Connor died of natural causes but no other details were provided.

London’s Metropolitan Police said at the time that the singer’s death was not considered suspicious.

She was public about her struggle with mental illness and was hospitalised after her teenage son, Shane, died by taking his own life in 2022.

‘Hideous’ wax figure withdrawn

Meanwhile, Dublin’s National Wax Museum has succumbed to pressure and announced it would withdraw a figure of O’Connor the day after it was unveiled to shocked reactions.

There was widespread public criticism that the wax statue did not resemble the cherished Irish singer, including from her brother John O’Connor.

“It looked nothing like her and I thought it was hideous,” he said.

The National Wax Museum announced on Friday (UK time) that “we acknowledge that the current representation did not meet our high standards or the expectations of Sinéad’s devoted fans”.

It would be withdrawing the O’Connor creation and would look for a “more accurate representation”.

O’Connor, who began her career performing on the streets of Dublin, rose to worldwide fame with Nothing Compares 2 U, released in 1990 with a music video in which she faced directly into the camera and cried.

She was known as much for her outspoken views on religion, sex, feminism and war as for her music.

O’Connor converted to Islam in 2018 and changed her name to Shuhada Sadaqat, though continued to perform under the name Sinead O’Connor.

She posted on her official Facebook account on July 12 that she had recently moved back to London, was finishing an album, and intended to tour towards the end of 2024 and early 2025.

Thousands of fans lined the streets of the Irish town she had called home during a funeral procession in Bray, County Wicklow, in August.

Irish Prime Minister Leo Varadkar attended, along with U2’s Bono.

– AAP