Well, there you have it! Swing that pendulum back one degree, and change the rules, how about this.
The RAF is an equal opportunities employer and investor in people etc etc.
It is delighted to offer the opportunity of maternity leave, but considers it unreasonable for the individual to gain experience and receive a fair appraisal during this period. Therefore the RAF offers individuals additional return of service beyond the normal exit date in order to redress the situation for both parties.