I have name changed.
I sort of tag-teamed a role with a colleague while we were on respective periods of maternity leave. She took the role when I went on mat leave (1st time). I then took it back but as a 4-day PT role when she went on mat leave (her leave and my return coordinated well). I went on mat leave for a second time and she again filled the role - also 4-day PT. She signed off with stress for several months and eventually got a position in another company and has now left. I am about to return from maternity but haven't been told officially what role I'm in - someone else will have been doing the one I was doing for several months so it's not guaranteed it will come back to me.
I haven't decided definitely to return and have asked my boss to notify me of my role ASAP (as if I am to resign I need to do it this week). Officially, the team will have positions available of same grade/type of work etc., but I just won't know the specifics.
I feel a little aggrieved about the role anyway - I'm not one to get stressed and to cope with the overwork I just resigned myself to not being able to do the role as well as it was done before (not surprising... it needed 5-days a week and normally working until 6.30-7pm to get it done, but I only had 4-days a week needing to leave by 5.30-6pm to pick up DS1), and I got a low mid-year assessment mark for my efforts - written off as I was about to go on mat leave.
I don't really know what I'm asking - I guess it's along the lines of do I have a case for constructive dismissal with any of this? I don't think so really; I think I've just been slyly shafted and I can't do much about it. DH works for same company in a senior role, so we don't want to make a fuss. In addition to the above, there were major team changes in the year (we now report into a totally new area) and no-one mentioned to me until I asked, having heard second hand by DH. However if he hadn't been working there I wouldn't have heard anything. I just think I've been treated poorly - I think they want me to leave (it doesn't surprise me; I don't have much drive to do the role well as I've really gone off the company dynamic).