Did you know there are grants available with the NewAngliaGrowthHub in the Suffolk & Norfolk, UK areas. The grants are for equipment required for expanding your business e.g. Shipping containers to build a Self Store business. Here is a link for more information: https://www.billiebox.co.uk/could-you-develop-your-suffolk-or-norfolk-business-with-a-grant/ Hope it helps.
I don't think chemical stores are allowed, as they are a legal requirement. So none. I was really recommending standard shipping containers for storage. Perhaps if you wanted to diversify and offer self-storage. You have to prove that you are expanding your business. By all means call the NewAngliaGrowthHub - Robert Turnbull T: 07467 148472 or 0300 333 6536
I recommend you have a chat with them. We do supply chemical stores to many different industries, where perhaps they are not a legal requirement.