To ask the Secretary of State for the Home Department what estimate she has made of the proportion of Class A drugs sold on the streets of the UK which had originated in Afghanistan in the most recent period for which figures are available. (227930)

Afghanistan produces at least 90 per cent. of the identified heroin and opium supplied to the UK. The size of the UK's heroin street market has been estimated at £1.2 billion out of a total £4 billion for all Class A drugs. On that basis, drugs originating from Afghanistan represent between 25 and 30 per cent. of the value of the UK's Class A market.