Apparently Agnetha and Frida filmed a greeting and had an interview for this BBC2 programme.  Information c/o TV Pop Diaries.

Part of the show is available on YouTube but has been edited down and no sign of Agnetha & Frida.  Given the content of what's on YouTube, they would have seemed very out of place with the rest of the line-up.

Anyone have any memories of this?

Thanks to David Smith.