Sir, Your feature 'Soft drinks harden up' (Focus on Soft Drinks, The Grocer, 30 April) was interesting and it was good that school drinks were touched on. However it illustrates the confusion over the phrase ' school compliance'.

It is important to point out that best practice is defined by the School Food Trust Voluntary Code of Practice for Drinks. This prescribes pure juice, milk, flavoured milk, water or combination drinks, which consist of at least 50% juice plus water and, perhaps most ­importantly, no preservatives as appropriate drinks for schools.

It is therefore worrying that the preservative E242 or Dimethyl Dicarbonate is used extensively in 'school compliant' drinks.

It is also clear to me that a school following the School Food Trust code is on a far higher quality level than the major multiples as far as children's drinks are concerned. Food for thought?

Tim Kearns, commercial director, JP Juices