Humans are omnivores, we can do fine on vegan diets. Cats however are obligate carnivores. They eat and need meat. Just like lions and other big cats. To make a cat vegan is to inflict on it a slow cruel death.
A story about a 'vegan kitten' that almost died hit the headlines recently:
http://www.realclearscience.com/blog/2013/07/kitten-fed-strict-vegan-diet-by-owners-nearly-dies.html
Please join me in asking Vegusto to stop selling vegan cat food. They cater for vegans and vegetarians who are animal lovers. To stock what they call a complete vegan cat food is misleading to customers and lethal to their cats.
After signing please consider contacting them through their 'contact us' section:
http://vegusto.co.uk/contact-us
Or write to them at:
Unit 1 Ashwyn Business Centre, Sheddingdean Industrial Estate, Marchants Way, Burgess Hill, RH15 8QY