Subject to the following provisions of this Part, for the purposes of this Part an employee is eligible for a redundancy payment by reason of being laid off or kept on short-time if—
he gives notice in writing to his employer indicating (in whatever terms) his intention to claim a redundancy payment in respect of lay-off or short-time (referred to in this Part as "notice of intention to claim"), and
before the service of the notice he has been laid off or kept on short-time in circumstances in which subsection (2) applies.
This subsection applies if the employee has been laid off or kept on short-time—
for four or more consecutive weeks of which the last before the service of the notice ended on, or not more than four weeks before, the date of service of the notice, or
for a series of six or more weeks (of which not more than three were consecutive) within a period of thirteen weeks, where the last week of the series before the service of the notice ended on, or not more than four weeks before, the date of service of the notice.