Shame there's other redundancies happening, otherwise you could nail them to the wall. Employers aren't allowed to stop you applying for other jobs, that's the joy of living in a free(ish) society.
Could you document it? You may have a case for constructive dismissal, assuming you haven't done anything to actually warrant it. That said, proving that was the reason could be impossible.
Can you hack their email to see if there's anything about it? If there's documented evidence about them agreeing to get rid of you for that, then it could stand up. You'd need to say an anonymous source gave it to you though.
On top of dano's hearty speech about tomorrow being another day and stuff (
), the other plus side is that they reckon the country is starting to pull out of the recession now so your chances of finding another job are increasing.
Best of luck!