In regards to unfair termination - Yes the question is what action have taken place , yet if there is a request to extend the performance and probation period, Again, this would only occure (but agree not in most companies minds) to have included reasons for the extention etc. But in responce to extending it, it doesnt exist at law [probation] to be able to extwnd it in the first place, and it comes down to performance or termination (lawfully)