Two police officers who swam across a freezing lake to drag a woman from a sinking car have spoken about what happened.
The officers made the heroic rescue yesterday morning in Totteridge after the woman fell unconscious at the wheel of her car and it careered into the water.
Today they returned to where the accident happened to speak to our reporter Paul Brand.
They described what greeted them as they arrived at the scene:
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The most hotly-tipped date is July 13, following the Nato summit which the president is due to attend in Brussels on the previous days.