I read numerous books - loads in fact - and, as I always do when recording a historical project, immersed myself into the subject matter. I spent many hours at Henrys old homes, such as Hampton Court, and visiting the Tower of London. I read no other books during that period.

But I listen to live recordings of things that I did back in the '70s and then how I've done things since. And there's no doubt about it: if I compare the two, it's like chalk and cheese.

I was born in 1949 - which seems like a long time ago... Actually, it is a long time ago, when I think about it.

My life revolves around music and always will. I need to be a part of music and not an observer.

Even the two times that I left, I never really felt like I left the band. It's very bizarre. It's like there's sort of an umbilical cord that stretches between us spiritually.

Actually, I only left twice. I left then, and then rejoined literally two years later for Going For The One.

Success is buried in the garden of failure.