Sat nights are regarded as sunday, for night workers if I am correct?,
If it forms part of her contract then she cant change it,
There is a opt out , where she can give 3 months notice,
But that does not mean that the company has to do so if the job requires her to work that day,
As it is iv yet to find a team leader that is allowed to work Monday to Friday,
and its not just about if she would be able to keep her job as team leader,
Its also about would she be able to move to a higher roll