Diana Lamplugh's two (and a bit, she insists) year-old granddaughter Amelia is amusing herself, and the assembled journalists, as we wait for her grandparents to finish their latest interview.

She remains a bundle of energy, but it's clearly been a draining day for Diana and husband Paul, physically and emotionally, as they revisit yet again the long search for answers about the death of their daughter Suzy.

This time, though, it's different. That is why their family is with them.

There is anger - considerable anger - that the man they are convinced abducted and murdered Suzy in 1986 is not to face charges over her death.

(Canaan) is in jail and we don't waste our energy thinking about him

Diana Lamplugh

And there is frustration over the missed opportunities of the original investigation, a fact they and the police blame partly on a difficult relationship between the family and the original investigation team.

But there is also something that seems close to relief, a sense of foreclosure that a family which has suffered together needs to experience together.

Since the investigation into Suzy's disappearance was reopened in May 2002, the Lamplughs have been making discoveries of their own - or, more accurately, a rediscovery.

"In some ways it feels as though we have lost Suzy for the first time, because the first time it felt like we lost another Suzy to the person she really was," Diana said.

Diana refuses to talk to Suzy's suspected killer

"This time, the police have looked at her as she really was."

At times during the first investigation, the picture of Suzy presented to the public was so distorted that Diana even questioned her own memory of her daughter, she said.

"The awful thing was that someone writes something, when you see it written down, you think they must be right and we must be wrong."

The relationship between the new investigating team and the Lamplughs is clearly different.

When DCI Jim Dickie, one of the investigating officers, described how prime suspect John Canaan like to think himself superior to the "plod" who were investigating him, Paul Lamplugh was quick to interject: "They are not plod."

Looking forward

For the Crown Prosecution Service, who decided not to take the case to court, there is a curt: "I think the CPS need to put a little thought into this", from Diana.

For Canaan there is simply contempt.

Suzy Lamplugh disappeared in 1986

"He is in jail and we don't waste our energy thinking about him. We don't even mention his name".

Diana has no intention of appealing to Canaan's better side - not that she thinks he has one.

When speaking to you, she is quick to deflect questions she does not want to answer, and quicker to cut you off if you try to press your case.

The Lamplughs are still hopeful that new evidence will come forward to finally convict the man who killed her daughter, and that one day they will find her body so it can finally be laid to rest.

But they are now a family looking forward rather than back.

They carry on Suzy's legacy through the work of the Suzy Lamplugh Trust, which works to reduce violence and promote safe living - with the emphasis on living.

As Diana and Paul prepare to leave, Amelia and her mother Tamsin - the Lamplughs' daughter - join them again.

Tamsin is heavily pregnant, and Diana's face betrays her pride as she tells me that her two beautiful grandchildren will become three on Monday.

It seems appropriate that as the Lamplughs lay to rest the 'real Suzy' they have rediscovered over the last two years, they also prepare to welcome a new life into the family.

In a very real sense, life goes on. It is, says Diana, what Suzy would want.