"It seems to me axiomatic that what is or is not reasonably practicable is in essence a question of fact. The question falls to be resolved by finding what the facts are and forming an opinion as to their effect having regard to the ordinary experience of human affairs.
"... There are occasions when time is running short and an originating application is presented as a holding measure in case it should be necessary to pursue it. That was not done in this case. The union were conscious of what their obligations were. Mr Gibson wrote to the applicant some two months after the date of dismissal, in sufficient time to find out what was her view about the next step to be taken and to act. He got no reply. He wrote again and got no reply. The evidence seems clear that for some reason unexplained those letters were not received by the applicant. We have not seen what the contents of them were, but we are satisfied from what we have been told that some mention was made of the right to go to an industrial tribunal. Mr Gibson was looking for authority to proceed in that direction. Having had no reply by letter, he made two telephone calls at different times to the number given at which it was believed the applicant was resident. In neither case was it possible to make contact with the applicant and indeed it appeared that the number was not the correct number.
"Contrariwise, does total ignorance of his rights inevitably mean that it is impracticable for him to present his complaint in time? In my opinion, no. It would be necessary to pay regard to his circumstances and the course of events. What were his opportunities for finding out that he had rights? Did he take them? If not, why not? Was he misled or deceived? Should there prove to be an acceptable explanation of his continuing ignorance of the existence of his rights, it would not be appropriate to disregard it, relying on the maxim "ignorance of the law is no excuse." The word "practicable" is there to moderate the severity of the maxim and to require an examination of the circumstances of his ignorance. But what, if, as here, a complainant knows he has rights, but does not know that there is a time limit? Ordinarily, I would not expect him to be able to rely on such ignorance as making it impracticable to present his complaint in time. Unless he can show a specific and acceptable explanation for not acting within four weeks, he will be out of court."
"Where an employee who presents his complaint of unfair dismissal out of time alleges ignorance of his right or of how and when he should pursue it, or is under some mistaken belief about these matters, an Industrial Tribunal must look at the circumstances of his ignorance or belief and any explanation that he can give for them, including any advice which he took, and then ask itself whether the ignorance or mistake is reasonable on his or his advisers' part, or whether it was his or his advisers' fault. If either was at fault or unreasonable, it was reasonably practicable to present the complaint in time. ..."