William Shawcross, the review's authorEdward Wong/South China Morning Post via Getty Images There is a "double standard" in responses to far-right and Islamist terrorism, a leaked review says. William Shawcross said definitions of far-right extremism were too broad, and called for a crackdown of Islamist groups. Alistair Carmichael MP told Insider the review "risks toxifying the debate around tackling extremism still further". The UK's counter-terrorism strategy has been guilty of a "double standard" when it comes to dealing with far-right and Islamist groups, leaked extracts of a major report suggest.