OK I've just had my hair cut and in the trendy city centre salon staffed entirely by people under 30, 3 had grey hair.
One was long and voluminous and teamed with doll-like blusher which gave her an 18th century aristocrat in a wig effect, the others were short.
They all looked great.
Obv some young people do have naturally grey hair, but this can't have been coincidence.
?????