Drugs: Hertfordshire Mike Penning To ask the Secretary of State for the Home Department how many crack houses in Hertfordshire have been closed in the last five years. Mr. Coaker Data are provided on a voluntary basis by Crime and Disorder Reduction Partnerships. According to the CDRP voluntary survey, 10 crack house closures have been issued to date in Hertfordshire, four in 2005-06 and six so far in 2006-07.