WGMS used one of the TM Century ( trailed on the CD’s as Century 21 presents ) packages called Classic Oldies which also ran at around the the same time on:-
Piccadilly Gold
Magic 828
Breeze AM
Radio 210 / 210 FM
On Magic 828 it sounded fab and i think it still stands up as one of the best oldies packages ever created.
In addition to what you’ve quoted from TM & JAM,WGMS also used the TM (Century 21) package Madison Avenue.I should point out though that they were only used when they linked up with Hereward between 2200-0600.However in wgms’s last days they resorted to the classic oldies package when linked with Hereward at said hours.