E10 FDU along with Voice of Greece

The usual spot of FDU, a presumably test-callsign of E10, is 6210 kHz. As always I was looking for E25 and I was tuning around 6140 kHz. So I stumbled upon E10 on 6210 kHz, calling FDU at 0928z. On the same frequency was Voice of Greece playing music related to the National Holiday of 28th October. E10 was calling "FDU" sporadically so I manage to record only one instance. No message followed. At 0946z E10 was calling FDUK (again with VoG QRM) and at 0951z FDU again. Finally, at 1015z I logged FDU8 without QRM this time!