Returning to work next week after 9 months maternity leave. Was told last week that my old job is not available to me (basically my superior has decided that she wants to combine a part of my old job with a lot of her job - to reduce her working hours - to create one new role MORE SENIOR to my old job, which leaves the rest of my old job as another separate role, which will be MORE JUNIOR to my old job). I have been given the choice of the two jobs. I have said that I am not prepared to take a less important job than before so the second option is not an option as far as I am concerned. However, the more senior job, while I've been told it will pay better (with no firm indication of how much better) is a MUCH more challenging role from a substance and work-life balance perspective. I feel that it is totally inappropriate for them to force me into this decision on return from maternity leave but feel quite powerless. I just want to go back to my old job, which I know and which I could manage alongside being a mum. I think it is quite unusual for someone to claim constructive dismissal etc. for being offered a more important job...but does anyone actually know the law in this area? Are they in any way in the wrong legally to make this offer? What is my fallback option?