Mathematics and music teacher Harold William Clayton has died, aged 89.

A schoolmaster at Summer Fields, Oxford, for 23 years, he co-wrote the maths textbooks, A Natural Approach to Mathematics.

He lived in Old Lodge at the school and tended the garden until he married his wife Margaret in 1953. She survives him.

The couple lived in the village of Brighthampton, near Witney, for 40 years.

He taught music at the school but his main subject was maths.

His five-volume series of textbooks was written in collaboration with DN Straker. They were published between 1965 and 1968 by the Pergamon Press, owned by publisher Robert Maxwell, who had children at the school at the time.

Years later, on a visit to the school in 1995, he expressed regret for having initiated New Maths because of the absence of logical thinking and geometry in teaching.

His hobby was breeding Labrador dogs and he took early retirement from teaching in 1970 to pursue this interest.

He died on June 17 after a short illness.