The US President's Chief of Staff, Denis McDonough, has said that the election of Hassan Rouhani to the Iranian presidency is a "potentially hopeful sign".
He added that Rouhani "will find a partner in us" if he lives up to his nation's obligation to "come clean" on its nuclear programme.
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Warm and humid over the next few days with rain at times in the north.
Warm temperatures will return to parts of the UK this week, hitting highs not seen since mid-July.
British runner Sir Mo Farah has completed his final track race in Great Britain by winning the 3000m at the Birmingham Grand Prix.