"Lord Justice Buxton's reference [in the Gascoyne case] to abuse of process or to considerations analogous to abuse of process are, in my view, references to the well-known principle that it may be an abuse of process to raise in one tribunal matters that could and should have been raised in another. So the relevant questions will always be, first, could the applicant have raised the question of lawfulness of forfeiture in other proceedings and, if the answer to that question is yes, why did he not do so? In the light of his reasons for not raising the matter in condemnation proceedings the Tribunal can then answer the question should he have done so and if they answer that question 'yes', then it will be, in most cases, an abuse of process for him to raise the question before the Tribunal."