I recently learned with amazement that Masterfoods (maker of Mars bars, Twix, Snickers, Maltesers and others) has started adding rennet from the stomachs of young calves to its products, clearly making them unsuitable for vegetarians.

I would urge all those concerned for animal welfare - either for spiritual or religious reasons - to spread the word and to contact Mars customer services on contact.uk@masterfoods.com or by calling 0845 0450042.

A similar campaign worked against Walkers crisps several years ago and it made most of its products veggie friendly.

  • Simon Kettering, Lewes Road, Brighton