In that case, it's unclear whether GLA authority had been obtained, only that it was not in evidence. Also whether this point had been raised in formal reps or added after the appeal was registered.
From what I've read recently, adjudicators are taking a harder line now, especially with appellants' representatives and introducing new lines of argument post-NOR which are unrelated to the NOR.
But if formal reps was simply a necessary step before arguing the point in detail at a hearing, so be it.
Anyway:
The NOR does not inform you correctly of your legal rights of appeal, specifically:
You have a legal right to have a valid(as to format) appeal registered if made no later than the end of the period of 28 days beginning on the NOR's deemed date of service.
The NOR states 28 days from.
The adjudicator at their sole discretion may register an appeal made late.
The NOR mentions this inaccurately and without its proper context under 'if you do not pay or appeal..'. The only reference to the adjudicator accepting an appeal late occurs in the clear context of a CC having been issued. What utter tosh. A CC being served has nothing to do with late appeals, let alone being a trigger.