I get older I get more cantankerous, but June [Hillary] gets a bit more cantankerous, too.

My relationship with the mountains actually started when I was 16. Every year, a group used to be taken from Auckland Grammar down to the Tangariro National Park for a skiing holiday.

I still think have this deep desire for our Himalayan Trust - that we raise the necessary funds, that we do all the things that the Sherpas want us to do, and I would like to see us working together with them on these projects. Even though I'm old and decrepit I still have this strong feeling that I would like to carry these things out if it were still possible.

I've always hated the danger part of climbing, and it's great to come down again because it's safe But there is something about building up a comradeship - that I still believe is the greatest of all feats - and sharing in the dangers with your company of peers. It’s the intense effort, the giving of everything you’ve got. It’s really a very pleasant sensation.

When I was 50 years old, I actually decided to draw up a list of half a dozen things that I really hadn't done very well, and I was going to make efforts to improve. One of them was skiing, and I really did become a very much better skier.

I always, I would say, make sure that in my presentation I'll have what I want to do. I try and make it so interesting to my companions that they want to go, too. I don't have to twist any arms or make - you know - any great challenges available.

I was incredibly stubborn. I mean, I believe that my father was frequently in the right, but I would never admit it, and so we did have a few set-tos on various topics; but on the whole as I got older and my father got more mature we got along reasonably well.