Hi edam
It depends when you get pg really.
Qualifying for SMP is based on whether you were employed at the crucial time, which is for the 26 weeks leading into the 15th week before your baby is due. If you are employed for those 26 weeks, you are entitled to SMP, regardless of the fact that you are on a fixed term contract.
If your employment ends after the 15th week before your due date, you will still get SMP, although it can't start until the 11th week before.
Following me so far?!
As far as maternity leave is concerned, you get 52 weeks maternity leave, but you can be made redundant at any point during maternity leave, at which point your contract stops and all contractual obligations on either side stop. So your contract can still be ended.
You still get SMP as mentioned above, but no other employment rights.
Only other thing is if your contract ends, i.e. you are redundant, while you are on maternity leave, if there is a suitable alternative position, it must be offered to you, regardless of whether you are able to take it up immediately or not, you get preference over anyone else as you are on maternity leave. Otherwise it's unfair dismissal and could also be sex discrimination.
Only trouble is if that happens before you have a year's service, you don't have any right to claim unfair dismissal, but it could still be sex discrimination.
As you can see much of this depends on when you get pg and when your contract would be ended, and whether there is another post you could take.
Hope that makes sense anyway, please say if not!