English mega-local elections, 2021

[S019]

As expected, Khan has indeed won, but by a bit less than polls had suggested. 55-45 in the second round.
Bailey was bolstered by a good performance in Northern Outer London and indeed relatively in many of Labour’s strongholds in East London, although he underperformed Goldsmith in Westminster, Kensington and Chelsea, Wandsworth, Merton, and the South West.

Where did you find these more detailed results, I can only find results broken down by London assembly district?

[S019]

Why did Labour crash so much in Kensington? It was close in both 2017 and 2019. It's especially bizarre given their gains elsewhere in that part of London, and the fact that Labour has actually won the seat federally in a recent election unlike Wimbledon or London and Westminster. London and Westminster does seem like an underrated flip for the election when Labour next wins government.