Professor Laura Spira reports no link between board diversity and profitability (Letters, July 2). Good. Why should there be?

Diversity must be implemented positively — if the research proves no link, then diversity won’t harm businesses either. The elites in charge will open their organisations to take advantage of a bigger pool of diverse people, but only in response to pressure.

That pressure may come from the employment market, from the markets in which the firms operate or from shareholders or even from regulation or legislation.

John Haddon
Barrowden, Rutland, UK