Mumsnet Talk

I was called when my DD was 2 weeks old to be told that my post was being considered for redundancy. We are now in a consultation period.
I work for a largish company and they are looking to make approximately 40 people redundant. Within my team there will be 4 redundancies.
I work part-time (0.6) and a colleague does exactly the same job full time (although I have considerably more experience than her and am on a higher salary scale).
We have been told that there will be one post available and that we will both need to apply for it - ie fight it out!
As far as I am aware I think I have the right to be offered the post - can anyone confirm this? My query is over being able to continue working part-time. Can I insist on this?
I have a meeting with HR and my line manager this week and so would like to be clear on my rights before hand - my union rep has not been much help so far.