"(1) References in any provision of this Act to a period of continuous employment are ... to a period computed in accordance with the provisions of this section and Schedule 13; ...
"1.(1) Except so far as otherwise provided by the following provisions of this Schedule, a week which does not count under paragraphs 3 to 12 breaks the continuity of the period of employment.
"The difficulty which, in our judgment, that submission encounters is that it gives no adequate force to the use of the word "normally". The paragraph in question is dealing with a period terminating in the redundancy of the employee concerned which, in the nature of things, is likely to be an unusual period. Its terms are those of a contract of employment which normally involves employment for the requisite number of hours. Those terms, in our judgment, direct the mind to the contract as originally drawn, and to the normal working of that contract throughout its life. So applying them in the present case, one finds, as did the tribunal, that the contract of employment normally involved, in the case of each of these ladies during the life of the contract, a period which exceeded eight hours. In our judgment, that is the correct approach to the paragraph and we therefore agree with the conclusion of the tribunal upon that point."