The key here is the company administration.
If the company was bought from the Administrators by a new organisation then your contract of employment starts all over again. TUPE is irrelevant.
Effectively your employment started all over again, TUPE covers business transfers not new starts. All the years you worked prior to that point will be irrelevant.
Your current employer seems to have breached the procedures associated with redundancy, which should follow the same lines as disciplinary action i.e. letter inviting you to a redundancy hearing, discussions, follow up meeting to discuss ideas alternative to redundancy that you may come up with (such as transfer to another branch if they have one), and then a follow up meeting to confirm redundancy.
You could take your employers to IT for such a breach.
As has been advised already, talk to ACAS or a Union rep if you have one.
For the record I employ approx 100 staff and deal with TUPE regularly. Sadly I also have to make people redundant from time to time too.
Andy and Grace
