I have to say, I’m quite impressed with Messrs Marks and Spencer. While having left us many years ago, in body that is, they’re still producing cool things. 

For example, their ever growing range of gelatine (melted down bones and tissue) free sweets. 

But, this very evening, I have purchased a packet of their crisps. Salted, multi-coloured crisps. 

Naturally, one would assume that purple crisps would contain food colourants. And, perhaps, that chemicals are needed to prolong their shelf life. 

But, no, that’s not the case. These crisps have only three ingredients.