Conman Rakesh Bhayani has been jailed for life with a minimum term of 27 years for murdering wealthy Carole Waugh, dumping her body in a car and spending her money.
Police described Bhayani as "a confidence trickster who murdered her with the sole intention of stripping her assets and the belongings she had worked hard for".
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Before the final declaration on Friday, the Conservative candidate looked set to lose the City Hall race to Labour's Sadiq Khan.
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.