Sinead O’Connor’s cause of death has been revealed a year after the iconic singer died, aged 56, in London. The musician died on July 26 last year at her home in London.

The Irish Independent has now been handed a copy of her death certificate, which states that she died from ‘exacerbation of chronic obstructive pulmonary disease and bronchial asthma together with low-grade lower respiratory tract infection.’

Her ex-husband John Reynolds formally registered her death last Wednesday in Lambeth, and it was certified by Inner South London coroner Julian Morris. The Dublin-born singer was found unresponsive by police at her south-east London home and pronounced dead at the scene.

A private funeral, attended by U2’s Bono, Bob Geldof and Irish President Michael D Higgins, was held in August. A procession then passed O’Connor’s former home in Bray, Co Wicklow, where thousands of fans lined the streets.

It was announced this week that a musical tribute to the musician and The Pogues frontman Shane MacGowan – who died in November after a long battle with ill-health and was a friend of O’Connor – was to be held at New York’s Carnegie Hall.

O’Connor’s version of Nothing Compares 2 U spent weeks at number one in the UK in 1990 and propelled her to stardom. She was also known for being outspoken on her struggles with her mental health and was said to have helped change Ireland because of her criticism of the Catholic Church.