I'm pretty sure you're right. There's certainly one full compilation CD on there (Mel Wynn, Tobi Legend etc.), but there's the odd one or two tracks that seem to materialise out of nowhere.
Further investigation last night revealed :
Cooperates
Four Larks
Capreez
Jack Montgomery
Candy & the Kisses
And yes I do play them otherwise it tends to be wall to wall Pink Floyd, Dire Straits or Kings of Leon.
Haven't been barred yet