Due to a probationary period being involved I'm sure they would use that as a get out clause at a tribunal; get a good reference and move on.

One thing that might have affected your position is how much work the business had on their books when you started and when they made you redundant. If business had slowed and they needed to reduce head count they may have looked at the situation and decided to get rid of you in favour of more experienced staff who they want to keep hold of. Even so, this should have been done properly using a skills matrix. Saying that, if you want to get rid of someone in particular it's easy to design a matrix that will show them in a bad light compared to other staff.

No, there was no fixed length on my contract.
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I have asked for a reference in advance. It seems like a good idea, and immediately answers the question about my short time there.

You sure you weren't trying to tamper with them old bints in the office?

Haha, God no!

Haha, there's your mistake.