I'm in Ottawa Canada, using a CC Radio plus. I to0k the radio outside the house last night and walked around with it to see if I was having some weird interference problem inside that was causing a short wave "spur". It's a legitimate signal. I tried tuning up to 558 which I know is an international frequency, and all I could hear was the splatter of something on 560. The signal definitely is at 555 Khz. When I t0ok the radio outside, the background house noise disappeared (obviously) but the station remained. It is the World Service.