Daniel Morgan’s murder shattered the family, and his wife and two children have shunned the limelight, while his brother has taken up the cause of campaigning for justice.

Five murder investigations have been launched between 1987 and 2011, looking particularly at the involvement of former work colleague Jonathan Rees, who went on to work with the News of the World, as well as a former police sergeant Sid Fillery and Glenn and Gary Vian.

The bugging by the Metropolitan Police of Rees’s office saw him jailed for seven years in 2000 for attempting to pervert the course of justice after he planned to plant drugs on a woman to win a custody battle, but any attempt to link him to the murder has failed.

Mr Morgan said: “These people who Daniel was dealing with are dangerous people.

With dad dead when Daniel was killed, at 38 I was the only man in the family and the responsibility of fighting this fell on me.

Daniel’s children have grown up well-rounded adults who are doing well.”

Son of Daniel and Isobel Morgan, Daniel Morgan was born in Singapore, but the family were forced to return to the UK to seek expert surgery on his club-foot.

Despite the condition, which saw his right leg develop so much less that his foot was two sizes smaller than his left, Daniel was a keen rugby player, a passion which united the brothers.

His father, who had served in a parachute regiment during World War II, died suddenly when Daniel was 15.

Shortly afterward Daniel enrolled in agricultural college in Usk, South Wales, before moving to Denmark to continue farming.

It was only on his return to the UK he became involved in private investigation work.

Mr Morgan said: “He always had a passion for small details – trivia. He loved the Guinness Book of Records and could tell you the fattest, thinnest, tallest, you name it.

"He was quite gregarious and just landed the job through a friend.”