Annabel Heseltine, the daughter of Tory grandee Lord Heseltine, will tell the Girls’ Schools Association that although boys are disproportionately identified with dyslexia, research suggests the learning difficulty is as common in girls.

Ms Heseltine, whose daughter and three sons as well as her brother and father all have the condition, believes she too may be dyslexic and is considering having a diagnostic test.

“It was only when I came across some old school reports of mine and saw various comments about lack of development, lack of co-ordination of ideas and an inability to communicate properly, that I thought I may well have mild dyslexia,” said the 48 year-old, editor of First Eleven magazine, for parents with children in independent schools.