"If there is a real doubt as to the propriety of the assessments then the issue should be resolved by the tribunal not only because the tribunal is the forum prescribed by Parliament but also because it is not the function of the Companies Court in the exercise of its winding up jurisdiction to adjudicate in respect of a genuinely disputed debt. By contrast, a company which is unable to pay its debts is not to be permitted to delay its winding up by advancing spurious excuses for non payment of the petitioner's debt". (3) Even if the material before the Companies Court does not lead to an affirmative answer to that question there is still a discretion to adjourn or even to dismiss the petition. Prominent in that analysis will be the question whether the company has had a fair opportunity to understand and to answer Customs' case and to challenge the propriety of the assessment, and again I read from the judgment of Sir Andrew Morritt in Arena in the Court of Appeal at para.92: "