Two police officers are on sick leave after being attacked by a mob in south London after they asked a 15-year-old girl to pick up her litter. One officer was dragged to the ground and kicked while the other was bitten by a girl who jumped on his back. Up to 30 people took part in the attack, which happened in North End, Croydon, on Wednesday afternoon. Trouble flared when the 15-year-old threw her food wrapper back on to the ground and became aggressive. Hospital treatment A girl who was arrested at the scene on suspicion of assault has been...