Here’s an article on the Global Terrorism Index which suggests that the UK and Europe are following the same trend: decreasing islamist terrorism and increasing far right terrorism.
“In 2018, far-right terrorist attacks accounted for 17.2% of terrorist incidents in the West. By contrast, attacks by Islamist groups accounted for 6.8% of attacks, and attacks not attributed to any group accounted for 62.8% of incidents in the West,”