The government, it's bodies, the media and wider society should refer to ethnic groups specifically, eg. "Black" and/or "Caribbean/African" "South Asian" "Arab" "East Asian" "Latinx", etc.
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The term BAME (Black, Asian and Ethnic Minority) is widely used to refer to all non-white people/communities in Britain.
The call to remove and stop using this term comes from the notion that ethnic minorities should not all be grouped together just because they're not white, as within this 'BAME' umbrella we all have completely different experiences.
For ethnic minorities to be 'othered' in a society that is claiming to be progressive and inclusive is neglectful and disrespectful.