“ (4) On an appeal under paragraph 15(3)— (a) the appellate tribunal may order HMRC to suspend the penalty only if it thinks that HMRC's decision not to suspend was flawed, and (b) if the appellate tribunal orders HMRC to suspend the penalty— (i) P may appeal to the appellate tribunal against a provision of the notice of suspension, and (ii) the appellate tribunal may order HMRC to amend the notice. ” 18. The jurisdiction of the Tribunal to suspend a penalty in circumstances where HMRC’s decision on those matters is challenged is restricted to cases where HMRC’s decision is “flawed”