I'm a little surprised this is compatible with habeas corpus, which (IIUC) is one of those rights that the Brits have beheaded kings over in the past.
Why is nobody sharpening an axe over this kid stuck in jail?
Why is nobody sharpening an axe over this kid stuck in jail?
There are routes to challenge 'wrongful' detention authorised by a court, but not via habeas. Some IPP prisoners have been released by the Court of Appeal criminal division on a (very late) appeal against sentence where other factors appeared after the original sentencing. You can also challenge the refusal of the Parole Board to release you by judicial review, though this is a fairly high bar to clear.