Detective Inspector Kev Broadhead from Nottinghamshire Police said:
"“Formal identification has yet to be confirmed, but at this stage we do believe we have found Elizabeth.
"It’s a tragic conclusion to the inquiry and one we were all desperately hoping we would not have to face."
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It will be a fine evening with clear skies, although turning cooler as the sun goes down.
Remaining dry with clear spells overnight and sunny spells Tuesday.
The campaign is aiming to raise £12,000 for the family of the firefighter from Leicestershire who died on duty at work.