Police activity outside a block of flats on Union Lane, Isleworth after a teenager was found fatally stabbed on Friday in west London by police responding to reports of a fight. (Photos: VCG)

Police activity outside a block of flats on Union Lane, Isleworth after a teenager was found fatally stabbed on Friday in west London by police responding to reports of a fight.

Police activity outside a block of flats on Union Lane, Isleworth after a teenager was found fatally stabbed on Friday in west London by police responding to reports of a fight.