Tony McCluskie has been found guilty of murdering his sister, the former EastEnders actress Gemma McCluskie, and dumping her body in the Regent's Canal.
He'd admitted manslaughter, claiming he couldn't remember the killing but must have lost control when she tried to throw him out of their home in Shoreditch.
Ronke Phillips reports.
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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.
A list of results for London Mayor and the London Assembly