Conversation so far:
What was the band Marmalade doing in 1975?
In 1975 Graham Knight linked up with former drummer Alan Whitehead to form 'Vintage Marmalade'.
Did any of the Marmalade band members receive formal education?
Junior Campbell was educated at Thorntree Primary in Greenfield and Eastbank Academy in Shettleston.
What happened to the band Marmalade in the year 1978?
Whitehead left Marmalade in 1978 to manage other pop groups and singers.

Question: Did they lose popularity when they lost the manager?
Self-contained rewrite: Did the band Marmalade lose popularity when they lost the manager Alan Whitehead?