Sir, Your otherwise excellent Focus On Cereals (15 January) contained one glaring inaccuracy. Due to the way Symphony IRI Group reports its data, value sales given for the Weetabix brand were £27.4m short.

I assume this is because, unlike the other brands in the 'Top 10', not all variants were included. Odd, as elsewhere in the article you cited the great success of Weetabix Chocolate. Weetabix value sales in the 52 weeks to 9 October 2010 were £130.8m, making it the number one breakfast cereal.

Sally Abbott, marketing director, The Weetabix Food Company