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I was dismayed to learn that People and Planet had given Times ÖйúAƬ incorrect data for the recently published Green League table ("How green is my tally?", 18 June).

As a result, my institution was shown languishing 19 places below its true position. I assume others were similarly misrepresented.

From the outset, I have thought that the Green League table, while well-intentioned, was a somewhat facile concept that trivialised the very serious work undertaken across the sector to improve sustainability. This debacle shows just how large a pinch of salt is required.

Sir Christopher Frayling, Rector, Royal College of Art.