Dismissal Review and Legal Advice Needed

I was dismissed from my role last month without proper notice or explanation. My employer claims redundancy, but I wasn't consulted and three weeks later they hired someone for a similar position. I have 8 years service and a good track record. I need someone to review my contract, the circumstances around my dismissal, and advise whether I have grounds for an unfair dismissal claim. I'm also concerned about potential discrimination elements, though I want to explore this properly with legal guidance first.