Starmer's style is generally to start his speech / question / response - then when the heckling / shouting over begins, he stands back and waits for it to be stopped by The Speaker, or to die down - then he carries on from where he was interrupted. This serves well at PMQ or parliamentary debates. But when he did the same the other night, his 45 seconds were up before he could get back to the point he was making.A few times early on, starmer appears to give way to the interruption and himself interrupted less. Second half his approach changed. This is the main cause of the disparity.