Oil and gas prices have jumped again as shipping through the strait of Hormuz came to a virtual standstill after Iran closed the waterway over the US blockade and Donald Trump announced an Iranian cargo ship had been seized trying to get past. Tehran has accused Washington of violating the fragile ceasefire agreement. With uncertainty over a second round of peace talks, fears continue to grow about the scale of the energy shock caused by the war. Lucy Hough speaks to the Guardian’s energy correspondent Jillian Ambrose. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>