Violence, loss and climate danger dominate today’s world news. In Britain, the death of former Conservative minister Ann Widdecombe has taken a sharply more serious turn, with counter-terrorism police assuming control of the investigation after new evidence emerged and a 28-year-old man was arrested and then rearrested under terrorism laws. In Northern Ireland, police have opened a murder investigation after three related people were found dead in a home near Ballymena, though officers say they are not seeking anyone else. In India’s Nagaland state, a suspected IED blast hit an Assam Rifles convoy, killing one serviceman and injuring four others. Europe, meanwhile, is counting the human cost of extreme heat, with more than 10,000 excess deaths linked to a late-June heatwave. And the arts world is mourning Sir Sam Neill, the New Zealand actor, who has died in Sydney at 78.