Daily Mail: The longest heatwave for seven years could come to an end this week as the heat and humidity look set to give way to lightning and downpours. But don't pack away the barbecues just yet - tomorrow the mercury is expected to hit 35C for the first time since 2006. Isolated showers are expected across Britain at the start of the week, but from Tuesday it has the potential to be very unsettled in eastern and northern parts with thundery downpours possible. However, there will be a lot of sunshine too,...