Michael Coombs, known as rapper Mike GLC, has pleaded guilty at Southwark Crown Court to supplying cocaine to an undercover reporter from the Sun on Sunday.
Former X Factor judge Tulisa Contostavlos, who is due to stand trial, denies being concerned in brokering the drug deal.
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Doctors can stop providing life-support treatment to sick baby Charlie Gard, Court of Appeal judges have ruled.
Armed police officers are patrolling on board trains nationwide for the first time, British Transport Police has said.