Mixing of NHK in English and some other SWBC station - I think in English but not sure - for about 30 minutes and then off at 0530 UTC as I was preparing to do TDoA on it. This was likely when one or both of the transmitters went off the air.
Three transmitter locations for NHK in English at that time: Moosbrunn (AT) on 5975 KHz, Santa Maria di Galeria (IT) on 9860 KHz and Issoudun (FR) on 11970 KHz.
This was heard on many SDRs in northern Europe so it wasn't just some mixing product in one receiver.