My sister works for a well known DIY retailer as an HR assistant. She went on maternity leave but has returned to find that the company is still retaining the person who covered for her role while she was away and she is effectively sharing her job now.
My sister had arranged to work from home during the afternoons when she got back to work, and this was agreed by her previous manager. However her manager has now changed and is expressing considerable doubts about whether this will work. She now has JOINT objectives with a person, who one might assume was after her role.

She’s very worried and I haven’t heard of this situation before. Has anyone any views about the legality of what’s happening?
Karen Drury