“The particular comments about finality in litigation are not directly applicable where the application concerns an intended appeal against a determination by HMRC, where there has been no judicial decision as to the position. Nonetheless those comments stress the desirability of not reopening matters after a lengthy interval where one or both parties were entitled to assume that matters had been finally fixed and settled and that point applies to an appeal against a determination by HMRC as it does to appeals against a judicial decision.”
“In the context of an appeal right which must be exercised within thirty days from the date of the document notifying the decision, a delay of more than three months cannot be described as anything but serious and significant. We note, although judgement was given only after we heard this appeal, that in Secretary of State for the Home Department v SS (Congo) and others[2015] EWCA Civ 387 the Court of Appeal, at [105], has similarly described exceeding a time limit of twenty eight days for applying to that Court for permission to appeal by twenty four days as significant, and a delay of more than three months as serious.”
“Only in those cases where the court can see without much investigation that the grounds of appeal are either very strong or very weak will the merits have a significant part to play when it comes to balancing the various factors that have to be considered.”