All through childhood, I wrote verses and mysteries. There is, for me, one connection: structure. My poetry is metrical, rhyming.

I was working as a secretary in Manchester and thought I would always do that. Then I got this letter offering me a two-year fellowship where I could write; they would pay me a salary and give me a flat to live in. It was heaven.

For me, a big part of writing psychological thrillers is choosing crimes committed for motives which would only apply to a particular person in a particular situation; a unique, one-off motive that is born out of someone's particular range of psychological afflictions.

My favourite Friday treat is to drive out of the centre of Cambridge, where we live, and go for a swim at the health club I've just joined out in the countryside at Quy. It's a lovely pool, inside a converted barn. Usually it's just me and a couple of other swimmers there.

Poetry consists in a rhyming dictionary and things seen.

My parents are good role models because they've worked hard and gave me a happy childhood.