I'm a librarian. I was due to start a course that will last a minimum of 6 months next week, and I'm also due to start maternity leave at the beginning of July. My managers have said I have to defer to 2013 because of this, stating that it will definitely take me longer than 6 months because of the way they've organised it. I've asked to meet to discuss it, and this request has been ignored. I then forwarded a list of questions I had, such as whether they had taken into consideration that they are limiting me to just 6 months maternity leave, by email, which has also been ignored. Union advice is to drop it or put a grievance in. I'm inclined just to drop it, because I'm very scared of rocking the boat so hard over just one unanswered email, and I would actually be OK with starting next year instead if I really have to. But also, I don't want to get walked all over, have my career progression held back and be discriminated against, which they are potentially doing. What would you do?