Ok it's hard to explain without a diagram.
Sarah (not real name) has been a manager for about 3 years. Went on mat leave 1 - came back part time 3 days a week. This worked fine. Mat leave 2 started 6 months later. Due back in 4 months - so about 10 months mat leave. However there's a NEW role which is basically Manager Plus and it can't be done in 3 days. So.. what's the deal here. Sarah has been told it's her role. But it's going to be a 5 day a week thing. Can they do that? I thought they had to offer her the same/equivalent terms. Can they get round it by making manager role redundant and manager plus the only suitable alternative?