I’ve an interest in a retail business. Recently, a new place opened nearby. I’ve no issue with competition and in fact if there’s a reasonable mix, the more places at a location the better, due to the clustering effect. However, it’s come to my attention that this new place is almost certainly not charging the correct VAT rate on sales, so presumably are just pocketing the amount they should be charging; the price of the product involved is very much set by the market and very much has a “going rate”. The question is: what, if anything, should I do about it?