A mother and her partner are due to be sentenced later, after being convicted for the manslaughter of a toddler.
Two-year-old Riley Pettipierre, from Belper in Derbyshire, died after drinking the drug methadone. Sally-Anne Dent and Shaun Binfield were found guilty of causing his death in January 2013.
The sentencing is taking place at Nottingham Crown Court.
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The House of Commons Petitions Committee has said they will keep an eye on the petition and are concerned about fraudulent signatures.
Oliver Healey, from Telford said he set up the page before the referendum and it has now been "hijacked" by Remain backers.
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