My Lords, I, too, support Motion A. I will confine myself to three comparatively brief points. First, as has been made plain, the Government have already moved from the earlier proposal of six months down to four. Yesterday, as those who have read the debate in the other place will know, there was barely a voice and no vote whatever against that proposal.
The noble Lord, Lord Ramsbotham, has few greater admirers than I in this Chamber but, as I suggested earlier, his amendment goes altogether too far. One defect is that it is internally inconsistent. I mentioned this on Report but did not think it necessary to do so in the last round of ping-pong, though I rather regret that now. On its face, it refers in new subsection (1) to detention under any of the relevant powers. These are defined in new subsection (6) and include two dealing with detention pending deportation. However, looking at new subsection (4) of Amendment 84, it does not apply in cases where the Secretary of State is determined that there will be deportation. This is an internal inconsistency.
I suggest that four months properly protects against any risk of what can seriously be called arbitrary detention. One must remember that it is a safeguard over and above the intrinsic ability of those who are detained to seek bail—a safeguard I acknowledge to be appropriate and necessary, not least in the case of those with mental health problems. The proposal in the amendment of the noble Lord, Lord Ramsbotham, that there should be exceptional circumstances to justify detention beyond 28 days is unworkable. The Minister gave reasons and illustrations, as did the noble Lord, Lord Pannick.
A shorter period, as proposed by the noble Baroness, Lady Hamwee—of whom, again, I am a great admirer—is, frankly, impracticable. Tribunals are already hugely busy and overworked. They really must not be overwhelmed.