15. If a woman who is entitled to apply to her former employer under the Reserve Forces (Safeguard of Employment) Act 1985 enters the employment of that employer not later than the 6 month period mentioned in section 1(4)(b) of that Act, her previous period of employment with that employer (or if there was more than one such period, the last of those periods) and the period of employment beginning in the said period of 6 months shall be treated as continuous.