Information on the quantities of selected class A, B and C drugs are published in supplementary table A5 of the Home Office Statistical Bulletin, “Drug seizures”. Copies of this and earlier editions of the bulletin are available in the Library of the House.
The data covers seizures by all police forces as well as seizures in England and Wales at major entry points by the UK Border Agency (the statistics for 2004, 2005 and 2006-07 were provided by Her Majesty's Revenue and Customs. Data on seizure quantities for other drugs are not available as it is not possible to accurately calculate conversion factors (based on drug purities) for less commonly seized drugs.
Data on the street value of drugs are not collected by the Home Office, however information on the street value of drugs has been provided by the Serious Organised Crime agency (SOCA). The information covers UK wide prices.