Job security

Should I be worried about my job? I'm a band 4 PA/Medical Secretary, and hearing all this news about NHS staff leaving is worrying me.

All the agency workers in my department have now been let go, which was expected.

Now I've just been told one of my duties is being given to someone else. I'm a bit confused by it and frustrated because it's something I've been working really hard with.

I'm not sure if this has been done with the intention of eventually letting me go? I'm the only secretary in this department and take minutes and that sort of thing, so I don't think they would get rid of me, but I just have a worry and am looking for some reassurance.