Temporary Contract?

[AIRHOSTIE:)]

Hi!
Can anyone help me with this question.......

I have been on a temporary contract now for the past two years.... the first one 6 months, second contract 10 months and now my final one finishes this march.... so all in all ive had 3 temporary contracts.

Does anyone know how long you can remain on a temp contract before they have to make me permenant?

All replies would be a great help

thanks
Sally
x x x