Tony Rivers is an old mate of mine, I believe (but I'm not too sure) that he is indeed a member of this board.
He once introduced me to Bruce Welch (of The Shadows) and i asked who's idea it was for Cliff Richard and The Shads to add 'End Of The Show' to their set in the late 70's , well they both did.
Tony worked for many many years as a Backing Vocalist with Cliff, hey he even did Live Aid (and also performed with Elton at said show)
Interesting, thanks for sharing!
I should add that Tony went on to form Harmony Grass, which, as the name implies, was more harmony-drenched sunshine pop. RPM also put out a nice digipak of their work.