13.—(1) If a person who is entitled to apply to his former employer under the [1985 c. 17.] Reserve Forces (Safeguard of Employment) Act 1985 enters the employment of the employer not later than the end of the six month period mentioned in section 1(4)(b) of that Act, his period of service in the armed forces of the Crown in the circumstances specified in section 1(1) of that Act does not break his continuity of employment,
(2) In the case of such a person the number of days which, for the purposes of Article 7(3), fall within the intervening period is the number of days between the last day of his previous period of employment with the employer (or, if there was more than one such period, the last of them) and the first day of the period of employment beginning in the six month period.