It goes up to some comissionares, Very rarely it goes to law and then only as a test case.
Most situations and almost anything you can think of would already have a test case.These test cases may have been sixty years ago but they still stand.So long as a relevant test case can be cited you have no recourse to law.Your right to appeal is with these commissionares.
That was the thing about the mps expenses scandal, under the rules that we get looked at these people would have been in a world of trouble.Some peoples tax affairs are very complex and an inquiry can go on for years. I read gordon ramsesy's book and he mentions this, he has a business (restaurants), but he also earns money in his own right as a tv person.When the tax man asks, who payed for that flight to america? it can be a head scratcher.