The Guardian leads with a follow-up to its investigation into the use of spying tools sold to governments by the company NSO Group. The paper says its revelations have sparked “furious political rows across the world” after it alleged the surveillance firm’s clients may have sought to target political opponents. NSO denies any wrongdoing and says the software is intended for use against criminals and terrorists and is made available only to military, law enforcement and intelligence agencies from countries with good human rights records.