MrsBigD do be careful of that - they may be making him 'redundant' so early on and then wanting to get him back on a different basis to avoid some of their responsibilities.
If they do want him back, it might be on a similar contract but just short-term, which is obviously fine but unless there really is no work for him currently, difficult to see why they would do that. But they may instead suggest he come back on a 'self-employed' basis.
But if he is doing the same job under similar conditions as he did when he was an 'employee' the Inland Revenue would consider him employed, not self-employed, for tax purposes and he could still have employment rights as well.
See here for information about employees, 'workers' (which can include casual staff, freelancers etc )and self-employed people and the rights they get.
Just so you're aware really, if they do want him back as a 'contractor' and assuming he wants to go, make sure he is aware of his status and his rights and responsibilities. Some employers do try and 'rearrange' people to avoid having them on the books in terms of strictly being an employee, for lots of reasons, budgeting, flexibility, headcount restrictions etc, but if someone is working in the same way as a traditional employee would, chances are that the IR and the Employment Tribunal would consider the person to be employed.
It may not be relevant, but just mentioning wanting him back as a contractor rang some alarm bells so I would want you to be aware of the similarities and differences just in case they try and abuse the situation.