Bucks Fizz - "Land of make believe"
I really doubt that any of you would see this eighties bubblegum pop hit as being Prog Rock.
And yet it technically spoken IS a prog rock song. Because it was written by Peter Sinfield who was in the original line up of King Crimson, then add to the fact that it has fairy tale lyrics, an unusual time signature and listen to the chord sequences.
In the early eighties "Prog Rock" almost became a dirty word and because of Punk having overturned the whole scene, fairy tale lyrics (Such as Rush' "Xanadu", Yes' "Yours is no disgrace" and Genesis' "Musical box") were replaced by songs about the bitter reality of Thatcher-led Brittain, unemployment and rioting were the next big thing.
So given that, it was a smart move by bands like Yes and Genesis to adopt a more mainstream sound and appearing to an audience that didn't want the Punk and new wave thing.
Peter Sinfield, perhaps was even smarter, by writing songs rooted deep in the Prog Rock vein but letting them be released by contemporary pop artists, making sure that he both could earn himself a living while also staying true to the music he became known for.
Peter Sinfield also wrote THIS little song for this, at the time not yet big, French/Canadian artist...
Celine Dion - "Think twice"
In both of these songs you can really hear the Prog rock background of Sinfeld, the eleborate musical arrangements and the use of surreal lyrics are a dead give away.