The Prime Minister's official spokesman said Ofgem has given "a very strong signal" that energy companies will not "get away with" bad practice after the it fined ScottishPower £8.5 million.
Asked if David Cameron was happy with the level of the fine, he replied:
Those must be, of course, decisions for the regulator but I think it does send a strong signal in response to bad practice that was being looked at here.
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The father of Captain Khan, who died in Iraq in 2004, said the comment was "the most cruel thing you can say to grieving parents."
Little Sophia Williams died in a children's hospital in Edinburgh on June 5.
Dry spells over parts of Scotland in the next few days and remain dry. More rain in the north. Temperature will remain mild.