Fields Taylor's parents hope a special high fat diet recommended by a dietician at Leicester Royal Infirmary Hospital will stimulate the parts of her brain which are not working as well as they should.
Three-year-old Fields from Melton Mowbray cannot walk or talk because of her illness.
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It will be a dry and bright start, however scattered showers will develop.
Rather cloudy, with some rain likely at first.
It's believed there were around 8,000 people who laced up for this year's 10k race.