'Fox News grew during the late 1990s and 2000s to become the dominant subscription news network in the U.S. As of September 2018, approximately 87,118,000 U.S. households (90.8% of television subscribers) received Fox News. In 2019, Fox News was the top-rated cable network, averaging 2.5 million viewers.' wiki.
British mainstream Media of course hate the very thought of GBNews so I would take their statistics & comments with a large pinch of sodium chloride.