Some wrong advice being given here. I am an employment lawyer with 20 years experience. The advice given earlier by tigerdriver that said ""In scenario one, there is no vacancy and the employee on mat leave would not be entitled to "bump out" one of the other employees, if she came bottom in the scoring". is wrong.
To recap tigerdriver said :
In my opinion, if there are three roles and the company only needs two, then it goes through a selection process, and assuming its criteria are lawful, it will select one person for redundancy. Not three, one. If that person is on mat leave, then they should be offered alternative work if it's there. In this example, unless there was another role somewhere else in the company or group, there is no vacancy. If there is no alternative work, the employee is dismissed for redundancy.
actually in that scenario if I read it right there are three sales people and one needs to go. Assuming that the woman on maternity leave is one of the three sales people she is entitled to be offered one of the two remaining jobs if she would otherwise be dismissed as redundant during her ML. A tribunal would have no doubt about that. The question of her coming last in any scoring is irrelevant as she is entitled to jump the queue for the job and not have to be scored.
By way of example, I represented a woman a few years ago. She was the only person doing her role in her department. During ML the company had two people doing the role. It then decided to move back to one person. It made her apply for the job and be interviewed. She refused. It sacked her. We won - easily.
If anyone is stuck on this area of law it is worth just reading regulation Regulation 10 of the Maternity and Parental Leave Regulations 1999. Other posters have correctly drawn attention to this regulation and this should be the starting point and probably the end point of your argument. That regulation states that where a suitable available vacancy exists the employee is entitled to be offered that role under a new contract of employment. That new contract of employment must, according to the law, be such that the work to be done under it is of a kind which is both suitable in relation to the employee and appropriate for her to do in the circumstances.
There is very little caselaw on this subject because most of the cases start and finish in an employment tribunal and therefore don't go up to the higher courts where they might be reported in law reports.
Common sense dictates that there must be some subjective judgement as to the word 'suitable'. I think the regulation must be read as " if there is a job that is in any wide sense 'available' and in a wide sense is suitable in relation to the employee then she is entitled to be offered it and in this regard suitable must be read as both being a consideration of whether the work is suitable for her and whether she is broadly suitable for the work. Consideration of whether there are other more suitable candidates shouldn't come into it as it is the woman's suitabity and the availablity of the job that are in issue.
Hope this helps.