Sharon Osbourne flew into Heathrow Airport early Tuesday afternoon to join her rock star husband at the hospital.

“Apparently he was on his quad bike and he hit something and he fell and the bike landed on top of him,” she told reporters at the airport after arriving on a flight from Los Angeles.

“I’ve not heard how he is since last night. I haven’t managed to speak to him on the phone and I am going straight to hospital to see him.”

Osbourne was hurt while riding a quad bike, or all-terrain vehicle, on his Buckinghamshire property in southern England.

The 55-year-old was “stable and comfortable” after emergency surgery that restored the flow to a blood vessel damaged in Monday’s accident, said Dr. Dick Jack, the medical director at Wexham Park Hospital in Slough, west of London.

“He’s still on a ventilator in the intensive care unit. He was seen on the ward round this morning and he is fine,” Jack said.

“When he was admitted, he had a fractured left collarbone, he had some damage to the blood vessel that is underneath it, he had eight fractured ribs on the left side and, in addition to that, an entirely stable fracture to one of the vertebrae in his neck,” Jack added. “This is not a major problem.”

The accident occurred while the singer was taking a day off from promoting the British release of “Changes,” a duet with his daughter, Kelly, his London publicist Planet Publicity said in a statement.