As far as I'm aware cayenne pepper is meant to be medium hot(which is what I wanted) and not very hot.
In order to ensure I am getting the genuine cayenne pepper I was trying a speciaist store (https://www.hollandandbarrett.com/shop/product/the-vital-ingredient-cayenne-pepper-60096681?skuid=096681) since general stores may have mixes or false labels.
However the packet says it is very hot which cayenne shouldn't be? Or are there varieties within cayenne pepper which are hot and this could be one of them?