Just to get this straight, I had a call fom my manager in the last week. She informed me that they were calling everybody. It was purely to say they were concerned that a lot of crew were quite scared about the circumstances we are all in and if I had any concerns that I could contact them just as easily as the union. I had no questions for her at the time and at no point was I asked how I had or was going to vote. The union and ballot wasn't even mentioned.
I have a good relationship with my manager and I've always found it easy to have a frank and open discussion with her. Maybe this is the call people have been getting?