Sophie Mattes suffers from a rare condition called Gastroparesis. The condition prevents her from experiencing feelings of hunger.
Here's Liz Wickham's full report into Sophie's daily struggles.
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The Tooting MP has been the frontrunner in the counting process ahead of Tory challenger Zac Goldsmith.
It's not just London where elections have been taking place today. There were council elections taking place across the home counties.
A list of results for London Mayor and the London Assembly