I realized sometime in the early '80s that if I didn't do something - like planning for the future in a way, a kind of pension or something - that if I didn't do something there and then, I was going to be condemned to forever present my three years as a pop star, condensed, as a stage act for the rest of my life. Because that's normally what happens to people in the pop business.

You want to sing this song. And so it goes on until eventually, after - well, however long it can take - sometimes a few days, sometimes months - you piece the whole thing together.

But anyway, I was convinced that it would go away, you know. But the idea was that he was sitting on a flight - you know, one of those sort of fairly long flights, like, sort of, you know, Newark to Denver or something like that - so, you know, a few hours.

So you can be about your business, and then on it comes again. And this time you're ready, and you've got a wine glass or something. And you put the glass up to the wall, and you can hear through the wall a little bit more of the song - maybe just the middle bit this time. You know, you managed to get in a little bit of the end. And so it goes on until - because you just got to - you really just want to sing it.

In the '70s, you had to come up with an album every year whether you were ready or not.

If a hit came along, I wouldn't be unhappy about that. But I'm a bit too old for that now-doing videos and all those types of TV shows. I've kind of done all that, in the '70s.

Well, this is shortly after the idea was put to me because it wasn't my idea to do a Christmas record. We can talk about that a little bit, if you like, later on. But I wrote that song actually about two days after the idea was put to me.