It’s completely spatial. I follow Graham on that a lot. I really think that painting is about space and proportions and where things go; it’s what painting is. Form, if it isn’t the right color, it is not in the right place. And you know you can actually change the relationships a lot by changing the color a little. Yesterday, something happened in my studio. I realized that new things come to you all the time when you work in art. I had forgotten that if Graham wanted to make something slightly off-white, he used violet instead of greying it, and it’s really good. So, last night I remembered that, and the painting worked out.

The way I often find what I’m going to write next is by writing.

First I like to do the guitar part, just because I feel like the guitar parts in most of my songs provide the foundation of the song. Then I’d go back and record the drums, and then figure out what other instruments were needed to fill out the song. It’s pretty exhausting being the only person in the studio, especially when it came to the arrangements. It made me miss being in a band with other people, because at least then you could be like, “What do you think? What should go here? Does this sound OK?” Whereas if you’re just by yourself, you’re like, “What do I think?” That was definitely hard because we had to do things quickly and it was easy to lose perspective and get lost in it.

With a lot of fear and trepidation. It’s totally improvisational because I work with collage, and cut up found warehouse paintings. I’ll sometimes stick a fragment or two on, and just try to figure out where to go from there. I’ve begun to think that I make each piece so differently from the other, and I don’t think that’s the way the art world likes things at this point. I think they like increments of change. While you would know it’s my work, I think I just always liked the challenge of how I’m going to compose. I get myself into a lot of trouble and hot water, and I just have to work on it, and work on it. I think that’s why some of my paintings are so awkward and odd, because I’ve had to deal with mistakes that I’ve made, and tried to correct them in some way.

The friends with whom I sat on graduation day have been my friends for life. They are my children’s godparents, the people to whom I’ve been able to turn in times of trouble, people who have been kind enough not to sue me when I took their names for Death Eaters.

Moments of pure inspiration are glorious, but most of a writer’s life is, to adapt the old cliché, about perspiration rather than inspiration. Sometimes you have to write even when the muse isn’t cooperating.

So given a Time Turner, I would tell my 21-year-old self that personal happiness lies in knowing that life is not a check-list of acquisition or achievement. Your qualifications, your CV, are not your life, though you will meet many people of my age and older who confuse the two. Life is difficult, and complicated, and beyond anyone’s total control, and the humility to know that will enable you to survive its vicissitudes.

I was a ‘research assistant’ at Amnesty International for a while, which was very interesting but I don’t think I was much of an asset as I am terminally disorganised (see my desk top for a graphic demonstration).

These days I can usually calm that particular critic down by feeding her a biscuit and giving her a break, although in the early days I sometimes had to take a week off before she’d take a more kindly view of the work in progress.

Always… as soon as I knew what writers were, I wanted to be one. I’ve got the perfect temperament for a writer; perfectly happy alone in a room, making things up.