To ask the Secretary of State for the Home Department what proportion of offenders serving sentences of (a) under 12 months and (b) over 12 months tested positive for (i) heroin, (ii) crack cocaine and (iii) cocaine while in prison in the last year for which figures are available. [99536]

Figures for prisoners in England and Wales testing positive under the random mandatory drug testing programme are not disaggregated by sentence length. Figures for heroin are included under the heading of opiates. Laboratory analysis is not able to distinguish between use of crack cocaine and cocaine. The respective percentages of positive tests for opiates and cocaine in 2001–02 are 4.6 per cent. and 0.2 per cent.