I have been poor and I wanted to document poverty; I had lost a child and I was obsessed with birth; I was interested in politics and I wanted to know how it affected our lives; I am a woman and I wanted to know about women.

Recording sessions were stimulating to photograph, because everything was in motion: the subject, the musicians, the technicians and the photographer. You needed fast reflexes to keep up with moving targets, and sensitivity and skill to get the pictures while keeping out of the performers' eyeline so as not to break their concentration.

I look for a sense of reality with everything I did. I didn't work in a studio, I didn't light anything. I found a way of working which pleased me because I didn't have to frighten people with heavy equipment. It was that little black box and me and £5 worth of film in my pocket or maybe it was only £2 in those days.

Lesson number one: Pay attention to the intrusion of the camera.

It doesn't matter if you use a box camera or you use a Leica; the important thing is what motivates you when you are photographing.

You should never reveal your true age.

I had in mind a long career.