Potential gang members are being offered lifesaving first aid lessons, so they can help with victims of attacks.
The classes are being taught by volunteer doctors and medical students.
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The London Mayor insisted he was "not saying that nationalists are somehow racist or bigoted" after outraging SNP supporters.
The teenagers, aged 19 to 15, appeared in custody at Westminster Magistrates' Court on Saturday, supported by their families.
Parker Dairies moves home after 120 years on Wood Street in Walthamstow