It may sound familiar. Much of the song is the same as that song, "Only You," that I posted earlier, as performed on the Tony Awards. The music is vastly expanded here -- "Only You" only uses part of the song, and then overlaps into counterpoint with the title song. And the lyrics are totally different, nothing metaphysical here, just a straight-on love ballad.
(Actually, if you listen closely, the song "Starlight Express" is sung in counterpoint here, too, though it's done almost as background arrangement , not as a separate standalone song, as is the case with "Only You.")
The number is sung by the female lead in the show, Stephanie Lawrence, on a 1984 TV appearance. And since this is from a TV show, there is an absolute lack of heavy mechanical costuming and roller skates.
Stephanie Lawrence had a very successful career on the London stages. She replaced Elaine Paige in Evita, was in Cats, and starred as Marilyn Monroe in a flop London musical. She also starred as Mrs. Johnson in Blood Brothers for four years when the show was revived in London 4 years -- and got a Tony nomination for it on Broadway. Unfortunately, she passed away in 2000, at the age of only 51.
But here she is, without a roller skate in sight, belting out "Only He."