Success is not like a cake that needs to be divided. It's more like a heap of stones - a cairn. If someone is successful, they add a stone to the cairn. It gets very high and can be seen from all over the world. That's how I see it.

Happiness is knowing and appreciating what you've got. I am very, very, very grateful for what, to me, is dead easy.

My father went to work by train every day. It was half an hour's journey each way, and he would read a paperback in four journeys. After supper, we all sat down to read - it was long before TV, remember!

When I was younger, I avoided exercise or anything strenuous. I didn't even enjoy walking. As I got older, I spent so much time marking books or sitting at a desk writing that there was no room for exercise - not that I would have bothered anyway.

After my hip operation, I had to cut out butter, which I loved, and salt. I no longer eat desserts with lots of cream, and I've cut right back on alcohol.

I have been luckier than anyone I know or even heard of. I had a very happy childhood, a good education, I enjoyed working as a teacher, journalist and author. I have loved a wonderful man for over 33 years, and I believe he loves me, too.

An English journalist called Michael Viney told me when I was 25, that I would write well if I cared a lot what I was writing about. That worked. I went home that day and wrote about parents not understanding their children as well as we teachers did, and it was published the very next week.