Robert Plant was involved in a serious car accident in northwest London earlier this month. Although the Led Zeppelin frontman walked away from the scene of the accident on the evening of July 2, his Audi A8 was reportedly unable to be driven after it collided with a Mercedes SL 300.

Although it's unclear whether Plant or the other driver, drug counselor Richard Grant, was at fault, the latter told the Telegraph, "I was unconscious for a little while and then I saw him standing there. I was pretty groggy when I saw him, but later on the officers told me who it was. I went to hospital for five hours and luckily there were no broken bones, but I was badly bruised on the arm and had whiplash."

According to a police spokesman said: "At approximately 7.45pm on July 2, police were called to a minor road traffic collision in Harrow Road, W10. There were no arrests and reports of very minor injuries." Meanwhile, Plant's spokesman declined to comment.

Grant's profession as a drug counselor seems ironic considering Plant was a notorious fan of illicit substances during Zeppelin's 1970s heyday and once supposedly hired a "coke lady" to get cocaine for the band. Of course, these days Plant has calmed considerably, dismissing recent lucrative opportunities to reunite with his former bandmates and even turning down offers to alternate with Abba as a replacement for Michael Jackson's 50-gig stint at London's O2 arena.

It seems that Plant is instead content continuing his collaboration with bluegrass favorite Alison Krauss. In fact, Krauss says that she and Plant have already started plotting the follow up to their Grammy winning album 'Raising Sand', telling the paper in a different report, "It'll be different, as if we hadn't made the first. I love being in the world of the unknown."