Thames Valley Police have said that forensic scientists are still searching for "evidence of Jayden in a cemetery and in a particular grave".
In a video uploaded to YouTube, Detective Chief Superintendent Andy Murray said that it was a "slow and meticulous process" and that scientists would remain there "if necessary, all night".
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Detectives investigating the murder of a young woman who was found dead at an address in south west London have charged two men.
In the run-up to the 8 June General Election, the Labour leader said he wanted to find a way of "reducing that debt burden".
Best of the clear, dry weather across the west overnight.