Tentative RFB plays Oldies on 6400 Khz at 0810 Utc with SINPO 34433 in United Kingdom. Jingle goes like single letters RFB. Station name a bit unsure as jingles are difficult to understand. Also at home with SINPO 23333 at 0840 Utc.
Finally puzzled out thanks to a email-post on A-DX.