The husband of the woman who died under unexplained circumstances at their Remuera home says he is being treated as a "person of suspect" by police.

Philip Polkinghorne, an Auckland eye specialist, told the Weekend Herald he was advised by his lawyer not to talk but he wanted to say his wife Pauline Hanna was the most "remarkable" woman who was adored by her family.

"The loss is insurmountable. I just can't think straight," Polkinghorne said.

Pauline Hanna, 63, died at her home in the Auckland suburb of Remuera on Easter Monday. Police are still investigating the circumstances around her death, which authorities are treating as unexplained.

"As you may or may not know I am a person of suspect so I need to talk to my legal counsel whether I should say or shouldn't say anything," Polkinghorne said.

Hanna worked at Counties Manukau District health board as an executive project director.

"She was incredibly hardworking, a magnificent woman who worked very hard for her community - she gave everything she had to make a success of the Covid programme making sure the hospitals had the right equipment and supplies. She worked night and day, Sunday was the last time she had a bit of time off."

Polkinghorne said he found his wife of nearly 30 years dead early on Monday morning.

"Our relationship wasn't fine, it wasn't fine at all, it was perfect."

The couple met through work and have three adult children from Polkinghorne's first marriage. One son is back from London in quarantine and the other two live in Auckland. Polkinghorne is currently staying with his sister while the couple's Upland Rd home in Remuera is being examined by police.

"The children are taking it one day at a time but we are all in shock, she was a lovely, lovely person."

Polkinghorne said she was always involved in the children's lives and was so happy to later have a grandson.

"She always considered them 'her children'. She adored them."

Polkinghorne said Hanna worked all through Easter but they were able to spend some time together on Sunday. The couple went to Highland Park where Hanna checked in on one of the vaccination stations before having lunch together and going home. After dinner, the pair watched television together and Hanna helped Polkinghorne write a letter.

"I said goodnight to her. I went to bed and she went to bed. That was the last time I saw her alive."

A source told the Herald Hanna was still sending work emails at 10pm on Sunday.

The following day Polkinghorne got up to make breakfast around 7am. The pair had planned to go to the gym after breakfast.

"Normally I go before her but she wanted to go to the gym at 9am. I think she had a meeting at 10.30. I got up to make her tea and toast – that's what she always had. She is the only person in the world that I know who can have a cup of tea lying on her back," Polkinghorne said.

"Then I found her dead. It was just horrible, horrible, horrible."

Polkinghorne said there were no problems in their marriage and he wasn't at liberty to comment about Hanna's state of mind or whether she was stressed.

"I know there was stuff she wouldn't talk about. Her mother died some six weeks earlier after an illness, she had been unwell for some time.

"I believe Pauline was overworked but she was extremely highly regarded by her work colleagues.

"People would ask me what her role was and I didn't really know, but she could fix any problem."

Polkinghorne doesn't believe an intruder came into the house because it was alarmed and monitored.

"I don't think there is anything nasty like that at all."

Polkinghorne hasn't been able to return home but he was allowed to get his wallet and car.

"I needed to get my wallet out of the house and some keys for what I call my red truck that was outside the property. We have three vehicles, two were inside the house and I asked the police if I could use the one outside," Polkinghorne said.

"Yesterday I was able to buy a toothbrush and a change of clothes and things because I had nothing."

A memorial service for Pauline Hanna was held at Middlemore Hospital yesterday. There is no funeral date set but Polkinghorne said his children were organising the details.

"Pauline was a beautiful lovely, lovely, lovely lady. I failed her. I failed her. I don't want to have to remember anything about her I just want her to come back into my life."