Zebedee is correct. There is no time limit now.
Here is an interesting point though. The company is planning new fleet now. Planning how to employ new crew on new terms and conditions. Before it removes 2000 hce from the books. Thats fine if the 2000 reduction is voluntary, but how can the company ask for any dispensation from legislation if it makes 2000 jobs compulsarily redundant. The argument that business takes an exceptional upturn in the later part of the year cannot be pre-announced. If so why legally lose the jobs in the first place.