Clerkenwell Magistrates Court heard the council was let down by private contractors but it accepted responsibility. Kurt Coelho, of the Health and Safety Executive, said that sub-contractors disconnected vents connecting the flues without telling the council. These had not been re-connected when the work was finished. Mr Coelho said: "It could have led to carbon monoxide poisoning to anyone in the living room. If the tenant was not aware of the situation it could have caused death."