Zero beat to WWV and BPM's USB. Difficult copy with STANAG under them too. Heard on an SDR in Germany.
Convo seems to be a mixture of English and something else, with either "bahstahds", "laddie", "your fuckin' (insert noun here)" or "aye" tossed in every few phrases, which makes me think the non-English parts are Scottish Celtic or Scots.
Convo wrapped up by 1820 UTC.