AMY WINEHOUSE's hubby has been beaten in jail, NOTW reports

BLAKE FIELDER-CIVIL is sporting a black and blue eye after being targeted by fellow inmates at the rough Pentonville prison.

"Blake's been running scared ever since he set foot inside Pentonville—and now his luck has run out.

"He got ambushed by a few blokes who thought he had heroin on him.

"He's been put in solitary three times already for failing drug tests so they figured it was a fair bet he'd be carrying some—although he wasn't."

"Because Blake is such a high-profile inmate, he's a natural target on the landings.

"There have been lots of threats and for a long time he just kept himself confined to his cell—he'll be staying there a lot more now."