Employment law is not simple, the basics of it are i.e. that a single job can be made redundant and that job cannot be filled again for a period of six months OR that it can be changed. You are then faced with a take it or leave it offer - but that has limits.
Useful advice is; take time to visit your local library for a couple of hours, seek out the latest books on employment law, and write down all the relevancies in employment that concern you.
Best wishes.