UPDATED 4:51pm: Mark Lundy had his mouth open and appeared shocked as he heard guilty verdicts delivered in the High Court in Wellington this afternoon.

Lundy has been found guilty of the murder of his wife and seven-year-old daughter in their Palmerston North home in August, 2000.

MORE: Mark Lundy Timeline

MORE: In Summary: The Mark Lundy Factfile

AUDIO: Our reporter Laura Dooney at the Mark Lundy re-trial

Lundy’s been on retrial in the High Court in Wellington for the murders of Christine and Amber Lundy.

After seven weeks of evidence the jury started deliberating at 1pm on Monday. The jurors had deliberated for 16 hours.

Justice France went on to sentencing immediately and has sentenced Lundy to life imprisonment with a minimum of 20 years non-parole.

He also thanked the jury for their efforts during the long and complex trial.

Police have welcomed the guilty verdict.

Detective Inspector Marc Hercock says this has been an emotional and stressful time for Christine and Amber's family who have had to go through the whole judicial process again.

"This verdict by no way makes up for the loss...the grief and the sorrow but I hope that at some level the family can gain some closure from this."

Detective Inspector Hercock has also acknowledged Crown Law and the investigation team who have work diligently for more than 18 months, reviewing and preparing for trial, as well as the witnesses and experts who have given their time at the trial.

Lundy's loyal supporter angry

Mark Lundy's most loyal supporter fell out with the defence legal team in the lead up to the retrial and is "extremely disappointed and more than a little angry" with the guilty verdict.

Geoff Levick worked to free Lundy for 10 years until his successful Privy Council appeal which overturned his double murder convictions in October 2013.

Shortly after the jury at the retrial again found 56-year-old Lundy guilty of murdering his wife and daughter Christine and Amber, Mr Levick maintained Lundy was innocent but was at pains to distance himself from the trial.

"I effectively had nothing to do with the preparation of the defence at trial and so all questions have to be directed to the legal team. When the dust settles, there's going to have be a free and frank analysis of what went wrong and assess what our options are."

The retired businessman, who by his own calculation spent thousands of hours researching the case and organising the Privy Council bid, confirmed he had fallen out with Lundy's legal team led by David Hislop, QC.

He wasn't sure whether he would continue fighting to prove Lundy's innocence.

"I don't know. It's going to take a little while to sink in and digest. But I'm extremely disappointed and more than little angry".

Statement on behalf of Craig (Mark Lundy's brother) and his wife

For the past few months we have had to relive the moment we were told a despicable human being took the lives of our much cherished sister-in-law Christine, and our beautiful niece, Amber.

This has been an emotional roller coaster for us and while today brings some form of closure, the loss of our loved ones will always remain with us.

We want to thank the Police, particularly those who have worked tirelessly on the investigation from the outset.

The work they have done has been sterling and we are grateful for their efforts as well as the support they have given us.

The outpouring of generosity and support from our family and friends has been incredibly humbling.

Thank you for being there for us through those days where it seemed like there was no hope.

We cannot express enough the gratitude and admiration we have for you all.

We do not wish to comment any further and ask the media to respect our request for privacy.

Police welcome verdict

At the High Court in Wellington today Mark Lundy was convicted of murdering his wife Christine and daughter Amber at their family home in Palmerston North on 30 August, 2000.

Following the verdict, Detective Inspector Marc Hercock acknowledged all the people who have assisted along the way.

This has been an emotional and stressful time for Christine and Amber's family who have had to go through the whole judicial process again.

While this outcome by no means makes up for the loss of Christine and Amber, we hope it provides some form of closure.

I want to acknowledge Crown Law and the investigation team who have worked diligently for more than 18 months, carefully reviewing evidence and preparing for trial, as well as the witnesses and experts who have contributed their time and expertise to this trial.

The role of the Police is to gather all information available, assess it for its relevance to the case and present the evidence gathered to the court and then leave it to the jury to make a decision.