Lydon, AKA JOHNNY ROTTEN, fears the pressure of being in the band prevented Vicious, real name John Simon Ritchie-beverly, from facing up to the heroin habit which killed him in 1979 at the tender age of 21.
Lydon says, "Sid was a great bloke, a barrel-load of laughs. But the cottage industry of punk has turned him into a humourless drug monster, which wasn't right.
"He didn't get the opportunity to get out of that drug problem. And taking him into the band at that point was a horrible pressure; I didn't notice it, I thought it was all right but I was lumbering him. It was my fault.
"That's how I feel about that. Why is it that the things we do have 20,000 reasons behind them?
"You have to be honest with yourself. I ain't no saint."