Relocation during pregnancy: ask the expert

I was due back to work from maternity leave today. I have relocated during leave, my employer knew before I went on leave that I would need a transfer. I contacted them to arrange a position closer to home, had a meeting about a position but then was turned down because of my ‘childcare arrangements’ which isn’t necessary in order for me to go to work (I could return to my job with or without childcare). My partner also works for the company and had a meeting with his manager about his shifts, to ensure we could fit around each other (he works nights). I contacted HR who said the position didn’t exist and when they spoke to the manager it turns out she had ‘2 people lined up’ for the position.That means it can’t have been advertised internally/ externally as HR would have known. I asked HR what I do now, they said they don’t have to help as I chose to relocate and am not an ‘internal transfer’. It states in my contract I am ‘entitled to return to the work in which you were employed, or if this is not reasonably practicable, to an alternative and appropriate job’. Surely it works both ways, I haven’t made ridiculous requests for flexible hours or anything, just asked for a transfer when a job comes up. My colleagues have already been told who is getting my job and what position they will get once I have ‘given confirmation’ that I won’t be returning, so although nothing is on paper and no contracts have been changed I feel I’m being pushed out of there. I have had to extend my leave for the full 12 months now although I cannot afford to. As they know I can’t return to where I was before, they have no interest in helping me find somewhere else (maybe in the hope I leave?). HR won’t even inform me of any internally advertised positions, so I have no way of finding out about them and most vacancies for my position are usually done internally and I know for a fact that they don’t always advertise or interview for them anyway.