THE death of an elderly couple who died from carbon monoxide poisoning is being investigated by the Health and Safety Executive (HSE).

Grandparents Donald O'Sullivan, 73, and his wife Rosetta, 70, were found collapsed in their Matlock Road home in Leyton on April 20.

A post mortem revealed they had inhaled the lethal, odourless gas.

A police investigation into the deaths has been completed and a file passed to the HSE.

A family statement made at the time of the couple's death said: “The tragic and totally needless deaths should not be in vain and hopefully will raise awareness of carbon monoxide poisoning.”

The couple married on March 31 1990, uniting two large families.

Mrs O'Sullivan, known as Rose, was a devout Christian and a member of the Methodist Church in Shernhall Street, Walthamstow.

Her husband was a retired painter who loved music and dance.

Mr O'Sullivan left three children, five grandchildren and four great-grandchildren.

Mrs O'Sullivan is survived by her three children, four grandchildren and one great-grandchild.

A date for an inquest is yet to be set.