Do black lives matter If so, which ones

On Saturday, while most Londoners were pondering the death of the Queen, a Black Lives Matter march took place through the centre of the capital. This was to mark the death of a convicted criminal called Chris Kaba. However, quite a number of black lives have been cut short in London this year, but these lives did not seem to matter enough to arouse anybody’s interest. #:~:text=Further data reveals 42% of,Black and 10% were Asian.