Healthcare leaders warn patients face major disruption in England this week, as the latest junior doctors' strike coincides with the hottest week of the year.
British Medical Association members will stage a five-day walkout from Thursday - the 11th in the long-running pay dispute.
It comes with a heat-health warning in many parts of the country with London potentially hitting 30C.
UK correspondent Gavin Grey says this will add additional pressure to hospitals.
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