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

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.

My earliest professional musical experiences were really as a session player, and every day was an adventure. Three sessions a day, every day, and you never knew who you would be working with until you arrived at the studio.

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

When the first list was being drawn up in the rock and roll book of Genesis, it would have been: In the beginning, God created Pink Floyd.

When I die, I'll probably climb out of the coffin and play the organ at my own funeral!

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.