To ask the Secretary of State for the Environment how many sites of special scientific interest in England have been de-notified since 1981 on the grounds of a decline in their scientific interest. 
The information is not available in the form requested. Between 1 April 1984 and 31 March 1991 statistical information on damage on SSSIs in Great Britain is set out in the annual reports of the former Nature Conservancy Council. Since 1 April 1991 similar detail for England is contained in English Nature's annual reports. Copies of annual reports are in the Library.