The ice later moved much further south. Here's something from a Canadian expert. As you can see, it's remotely possible to meet bergs in very unlikely places.
"Before some icebergs completely deteriorate they may travel many thousands of kilometers. Originating at around 75í‚Â° north latitude in Baffin Bay, an iceberg may travel up to 4,000 km south to around 40í‚Â° north latitude (800 km south of St. John's). Extremely unusual sightings in Bermuda and Ireland have occurred well outside of this normal limit."