Keith Maddock appeared at Ipswich Crown Court and admitted producing cannabis - Credit: Charlotte Bond A Suffolk builder who set up a cannabis factory in the loft of his home has been given a suspended prison sentence. Police officers who went to Drivers Farm Barn, in Finningham, on an unrelated matter noticed a strong smell of cannabis and heard a dull whirring noise, Ipswich Crown Court heard. When an officer used a ladder to look into the loft he found 43 cannabis plants in three different growing areas. There were 17 mature plants and the rest were immature and an expert estimated they had a maximum possible street value of £25,000, said Benedict Peers, prosecuting.