Police in Egypt have denied reports that two Egyptian lifeguards have been arrested following the death of five year-old Chloe Johnson on Friday.
Chloe from Forest Hill drowned in a swimming pool while on holiday in Sharm El Sheikh, Egypt.
Police say they are continuing with the investigation.
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The ComRes survey for ITV News and LBC showed the Labour candidate increasing his overall lead over Conservative rival Zac Goldsmith.
The latest poll for ITV London and LBC shows Sadiq Khan leads Zac Goldsmith by 45% to 36% on first preference votes.
Corbyn was unveiling a poster less than a mile away as Khan gave his final campaign speech to party supporters in London.