Further tests will be carried out concerning the deaths of two soldiers - including one who lived in London - during SAS selection training in the Brecon Beacons.
Edward John Maher and Lance Corporal Craig John Roberts collapsed on one of the hottest days of the year while climbing south Wales' highest mountain.
An inquest at Brecon Law Courts in Powys, mid Wales, gave the medical deaths of the pair as "unascertained".
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Large plumes of black smoke could be seen coming from the boat which caught fire while anchored on the River Thames.
London mayor Boris Johnson is under pressure to issue health warnings about his new double decker bus during the heatwave.
It's all over in a split second when you watch on TV. But just look at what happens when a serve at Wimbledon is played in super slo-mo.