The resource required to fully answer the request is considered manifestly unreasonable.
However, it is our intention to be open, transparent and proactive in publishing some of the requested information. Some has already been released in the past and some has recently been released in the Chief Nuclear Inspectors Annual Report 2013.
Information of the type you request for the period 2001 - 2011 is currently being compiled in a report which ONR plans to publish early in the new year. A follow up report for the period Jan 2012 - March 2013 is in the early stages of development and should be published separately in early 2014. Following this it is our intention to release information on an annual basis.
With regard to the transport of radioactive material (whether connected with the civil nuclear power programme or otherwise) we have interpreted "leak" to mean an event where the radioactive material or part thereof escaped from the package being used to transport it. In response to your question:
We are sending you (hard copy) reports which detail abnormal events that occurred during the transport of radioactive material in the UK for each of the 13 years from 1989 to 2000 inclusive together with two summary reports.
Look for the heading "Health Protection Agency reports" and the dropdown list entitled "The reports and how to obtain them" which will show a list of reports entitled: "Radiological Consequences Resulting from Accidents and Incidents Involving the Transport of Radioactive Materials in the UK - 20xx Review", instructions to access these reports are underneath the list.
The report covering events during 2012 is being prepared and should be ready during the first quarter of 2014. Work to produce the report covering events during 2013 is expected to start in 2014 with the aim of publication in the autumn
Section12 (4) (b) of the EIR.