A gambling addict who turned to drug dealing to pay off his debts has been jailed after he tried to sell crack cocaine to an undercover police officer.Mark Simpson was trying to recoup losses of £70,000 when he came to Exeter to sell class A drugs on behalf of a South London gang.He was working with an Exeter man when they offered to sell £110 worth of crack to two undercover officers in Well Street and were promptly arrested.The pair were operating out of 39-year-old user Anthony...
