The 69-year-old guitarist - who has just released 'Rattle That Lock', his first individual release since 2006 - recorded 'A Boat Lies Waiting' for his former bandmate who sadly passed away from cancer in 2008 and was reminded during the making of his LP of the ''great loss'' of a talented musician and friend.
Speaking to The Sun newspaper, he said: ''It was a great loss and we're still very sad about it. There have been moments during making this album where I've had other keyboard players around who are very, very good and we've got on very well but one is constantly reminded of what one has lost.''
The track itself was written 18 years ago but, Gilmour reveals, it didn't ''reveal itself'' for a long time.
He explained: ''The piece of music at the heart of 'A Boat Lies Waiting' was recorded at home on a piano to a mini disc player 18 years ago ... sometimes it takes a while for a piece of music to reveal itself in its entirety and I'm still baffled by the process.''
Although Pink Floyd - also comprised of Nick Mason and previously Roger Waters and Syd Barrett - will not tour again or release new music following 2014's 'The Endless River', Gilmour will always be proud of the band and will never let the ''memories'' fade.
He said: ''Pink Floyd is a big part of my life and something that I'm extraordinarily proud of. It gave me a lot of joy and fun.
''I'm in no way closing the door to my memories and times we had and all those things. I'm just saying that I won't be going back to something that's got that title.''
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