Lomu will be doing a speaking tour while in England, but said it would also be a tour of dialysis units.
"By the end of it I'll have learnt the ins and outs of every clinic in the country," he told the newspaper.
His sons, aged four and six, are with him on the tour, along with their mother.
"I want them to learn about the game. Learning about the history of rugby, you can't get any better than doing it in the country where it all started. Then there's Paddington Bear. I'm trying to tell them about the history of rugby and all we've heard since we got here is: 'When we going to Paddington station?'"
His performance in the 1995 World Cup semi-final - "steam-rolling" England with four tries - was also a talking point during the interview.
"People say to me that semi-final must have been the best game you ever played. And I say yeah, maybe. But imagine what I could have done if I was healthy."
At the time Lomu was suffering from kidney disease. His training was scheduled around a condition that left him anaemic and exhausted.
"I had problems when I got abrasions, they just always got infected," he said.
"And I felt so tired. When the lads went out to socialise, I'd take a sandwich back to my hotel room. And I was usually so tired I'd wake up five hours later with egg and salad all over my face."
Lomu, still battling his kidney problems today, described his 2011 health scare when his body rejected the kidney that was transplanted in 2004.
"Everything that could go wrong went wrong. It was a battle. I'm lucky enough to still be here."
He now needs a second new kidney and until one can be found, he requires regular dialysis - six hours every other day spent lying in a hospital bed hooked up to a machine that cleans his blood.
"Yeah, there's only so many movies you can watch, so many emails you can catch up with. But I don't let it get me down. Everybody has their ups and downs. For me, getting up is not a chore.
"I'm enjoying being here. My boys are my little human alarm clock and they won't let me get down."