A pathologist at the Claire Squires inquest has told the coroner she died from acute heart failure complicated by the presence of the performance enhancing supplement DMAA.
The coroner at Southwark has also been told that DMAA is now a banned drug in this country since August 2012 .
Claire died in April 2012 just a mile from the finishing line of the London marathon.
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Fog patches and extensive low cloud at first will steadily lift and clear.
A murky start with mist and fog then gradually clearing, although some eastern coastal districts may remain cloudier.
Isolated showers should die out through the evening to leave a dry remainder of the night.