I once heard that Roy Norry acapella on air donkeys years ago on Radio Merseyside.
Tagged onto the end of it was (part of) a JAM jingle which went “from the BBC” which, if I remember rightly, had some nice guitar chords on it.
The station what came before Carnival Radio in the demo was actually Blue Danube Radio, which was an Austrian radio station owned by the public service broadcaster ORF.
I have noticed that only 8 stations in the demo are/were real stations (as far as I know it), and 5 cuts are DJ cuts (also they should be Anne Ryle and Tony Allan, not Anne Royal and Tony Allen, my bad!)
The rest of the cuts were for fictional stations made up for demonstration.
Another mistake on the list is that the jingle before Gateway Radio was also for BBC Radio Wales, but I just didn’t hear the W!