definately sonds like a case for unfair dismissal, as long as you were not on a probationary period. You have to get things moving pretty quick as you only 3 months to lodge a complaint with the Employment tribunal, 1st thing get all thefacts wrote down, contact either the CABor a solicitor, if your not working you may be entitled to legal aid, thats a nit of a mine field, and not every solicitor doeslegal aid for employment matters.
Long shot but ifyouhave home insurance, ring them andcheck if you have legal cover, as they may be able to help you out.
Good luck