 Brighton today is a large, jolly, friendly seaside town in Sussex, exactly  one hours journey from London.  But in the years between the two wars, behind the Regency terraces and  crowded beaches, there was another Brighton of dark alleyways and festering  slums. From here the poison of crime and violence and gang warfare began to  spread until the challenge was taken up by the Police.  This is a story of that other Brighton 