OT - Since writing that I did a bit of googling and there is a small Wikipedia entry about them. The original singer's name was Tony Kenny apparently, not Peter. The original Kenny hit (that he sang on) was called 'Heart of Stone' and the unknowns who became Kenny are referred to as Chuff not...
OT - I do believe you are correct. Weirdly I know a little bit about them as years ago a friend's girlfriend worked for the producer Micky Most's RAK organisation and she was involved with them. Originally the 'Kenny' in question was an Irish singer (it was his surname, can't remember his first...