Caribbean Listener wrote:

Yes, Steve, they still use the tonic signal that sounds like something
like: "Beee-Beee-Ceeeeeeee" for their South American service. I heard
it a few nights ago, and yes, I hadn't heard it for such a long time.
By the way, my favorite interval signal, which is being cut a bit,
still remains RFI's jazz version of their national anthem.

Thanks for the tip. I'll give it a listen as it's been a while since I've
heard it from the BBC.