Singer Pete Doherty, the on-off boyfriend of supermodel Kate Moss, was told he faced a jail sentence next month if he failed to demonstrate he was trying to kick his drugs habit.

At a court hearing, district Judge Davinder Lachlar told Doherty she was adjourning sentencing for a series of drugs offences until another hearing in four weeks' time.  “What I have in mind is a community order or prison,” Lachlar said at West London Magistrates' court. “If he does not show the motivation in four weeks', it will be prison -- it's as simple as that.” She told Doherty's lawyer Sean Curran that a financial penalty was a "totally unrealistic suggestion”.

 The singer told the judge he understood her instructions. Lachlar had ordered Doherty, 28, to undergo detox treatment at a hearing last month. On Tuesday, she gave credit to Doherty for attending rehab, but said it was "early days" as he had only been receiving treatment for about a week. The court heard that Doherty, during the hearing,  showed signs of drugs in his system.