“I was very fortunate to be in the right place at the right time to work with the band on Dark Side Of The Moon. I had worked with them briefly as mix engineer, but now I was engineer. I had worked my way up and proven myself as what Abbey Road called a ‘balance engineer’ as opposed to a ‘button pusher.’

“I put in a lot of hours. Sometimes I’d work into the night because I’d run off rough mixes after the band had gone home. Sometimes I came in early in the morning to do orchestral sessions with somebody else, but I always made sure to be available for Floyd so I didn’t have to share the engineering credit with somebody else.

“The whole thing was written out pretty much. There were a few things that were developed in the studio, but on the whole, Roger Waters had written everything by the time we started. In fact, they performed it even – during the recording, they went out and played it live and learned from that experience.

“As for the Wizard Of Oz... I have to keep correcting people: The band were actually watching Mary Poppins the whole time they were making the album. [Laughs] Or we can tell it differently and say they were watching Chitty Chitty Bang Bang!”