The mum of murdered private investigator Daniel Morgan “never stopped fighting” to seek justice for her son - but has died without seeing anyone convicted for his death.

Daniel was found in the car park of The Golden Lion pub in Sydenham with an axe in his head on March 10, 1987.

Nobody has ever been found guilty of killing the private eye, who ran the Southern Investigations detective agency.

Daniel's death was described by Theresa May in 2014 as “one of the country's most notorious unsolved murder cases".

His mother Isobel Hulsmann campaigned tirelessly to uncover the truth about his murder, and often travelled from her home in Hay-on-Wye, Powys, to lay flowers at her son's grave in London.

She had been diagnosed with cancer six months prior to her death, aged 89, which was announced on Friday (November 24) by Daniel's brother Alastair Morgan.

He said in a tweet: "My dear mother and fellow justice campaigner Isobel Hulsmann passed away peacefully yesterday. RIP Mum xxxx"

He told WalesOnline: "She had a long life, but it's caused us all great stress and distress throughout, but my mother never stopped fighting.

"Until fairly recently she was attending all the meetings, but in the last six months she was too ill."

An independent panel was set up in May 2013, at an estimated cost of £30 million, with the report expected to be published next autumn.

It's aim is to shine a light on the circumstances of Mr Morgan's murder, its background and the handling of the case over the period since 1987.

Scotland Yard admitted that the first inquiry into the 1987 killing had been hampered by police corruption.

Five people were arrested in 2008 but two of them, including a former detective accused of perverting justice, were discharged after a string of "supergrasses" were discredited.

The then-Home Secretary Theresa May said: "After numerous separate police investigations into the case between 1987 and 2002, the Crown Prosecution Service discontinued the attempted prosecution against five suspects in 2011.

"The Metropolitan Police admitted that police corruption was a 'debilitating factor' in the original investigation."

A spokesman for the Metropolitan Police said the force continued to provide as full as possible support to the panel.