A full Nominet Expert decision, stripping a dot-UK web domain from someone who breaks Nominet's domain registration rules and handing it to someone more deserving, costs £750 plus VAT. Should the initial decision not go your way, an appeal to a panel of three Nominetters costs no less than £3,000 plus VAT.
This is a very good reason why people "should" keep information publicly accessible on whois (or on a whois replacement). Whois can tell me if a company owns multiple domains. When Companies try to "hide" their email address, it makes it difficult to verify domains. What companies "should do" is rather than give out their personal email, they should give out an alias that points to their personal email.